Midrash su II Cronache 20:21

(Exodus 15:1) "Az yashir Mosheh": Az ("then") sometimes signals the past and sometimes signals the future. The past: (Genesis 4:26) "Az men began", (Exodus 4:26) "Az she said", (Exodus 15:1) "Az Moses sang", (Numbers 21:17) "Az Israel sang", (Joshua 10:12) "Az Joshua spoke", (I Chronicles 15:2) "Az David said", (I Kings 8:12) "Az Solomon said." And sometimes "Az" signals the future, viz.: Isaiah 60:5) "Az you will see and flow", (Ibid. 58:8) "Az your light shall break forth as the morning", "Then there shall be opened", (Ibid. 35:6) "Az the lame man shall leap as a hart", (Ibid. 5) (Jeremiah 31:12) "Az the virgin will rejoice in the dance", (Psalms 126:2) "Az our mouth will be filled with laughter", (Ibid.) "Az they will say among the nations." Variantly: It is not written "Then Moses sang," but then Moses will sing" — whence we derive the resurrection from Scripture. (Exodus 15:1) "Moses and the children of Israel": Moses was equivalent to all of Israel, and all of Israel, to Moses, when they sang the song. Variantly: "Moses and the children of Israel": We are hereby apprised that Moses chanted the song opposite all of Israel (i.e., that his voice was over and against those of all of Israel.) "this song": There are ten "songs." The first, that sung in Egypt, viz. (Isaiah 30:29) "The song (of Sancherev's destruction [on Pesach night]) will be to you as that of the night on which you sanctified the festival (Pesach [in Egypt]), etc." The second, that of the sea — "Then Moses sang." The third, that of the well (Numbers 21:17) "Then Israel sang." The fourth, that of Moses, viz. (Devarim 31:22) "And Moses wrote this song (32:1-43). The fifth, that of Joshua, viz. (Joshua 10:12) "Then Joshua spoke to the L rd on the day the L rd delivered, etc." The sixth, that of Devorah and Barak, viz. (Judges 5:1) "And Devorah and Barak the son of Avinoam sang, etc." The seventh, that of David, viz. (II Samuel 22:1) "And David spoke to the L rd the words of this song, etc." The eighth, that of Solomon, viz. (Psalms 30:1) "A psalm, a song of the inauguration of the Temple of David." Now did David built it? Did not Solomon build it? viz. (I Kings 6:14) "And Solomon built the Temple." Why, then, is it written "A psalm, a song of the inauguration of the Temple of David? But because David devoted his life to building it, it was called by his name. Similarly, (Psalms 132:1-6) "Remember, O L rd, unto David, al of his tribulation (in seeking a place for Your sanctuary), which, (to find the place,) he swore to the L rd, vowed to the Strength of Jacob: Forefend that I came to the test of my habitation (my palace), that I go up on the bed spread out before me, that I give (superfluous) sleep to my eyes or slumber to my lids, before I find the (fore-ordained) place for (the Temple of) the L rd, the habitation of the Strength of Jacob. We had heard it (that place) to be in Efrat (the most select of places), and, lo, we have found it in the fields of the forest (in the boundary of Benjamin, who is likened to a beast of the forest" [viz. Genesis 49:27]). And what is written afterwards? (I Kings 12:16) "See your house, O David." Because David devoted his life to it, it was called by his name. And thus you find that whatever a man devotes his life to is called by his name. Moses devoted his life to three things, and they were (all) called by his name. He devoted his life to Torah and it was called by his name, viz. (Malachi 3:22) "Remember the Torah of Moses, My servant." Now is it not the Torah of G d? viz. (Psalms 19:8) "The Torah of the L rd is whole, restoring the soul." How, then, are we to understand "the Torah of Moses, My servant"? Because he devoted his life to it, it is called by his name. And whence do we find that he gave his life for Torah? In (Exodus 34:28) "And he was there with the L rd (to receive the Torah) … Bread he did not eat, etc." And it is written (Devarim 9:10) "And I stayed on the mountain forty days and forty nights, etc." — Because he devoted his life to Torah, it was called by his name. Because he devoted his life to Israel, they were called by his name, viz. (Exodus 32:7) "Go, descend, for your people have wrought corruptly." Now are they not the people of the L rd? viz. (Devarim 9:29) "For they are Your people and Your inheritance," and (Ezekiel 36:20) "… when it was said of them: These are the people of the L rd, and they came out of His land." How, then, are we to understand "Go, descend, for your people have wrought corruptly"? Because he devoted his life to them, they were called by his name. And whence do we find that he devoted his life to them? In (Exodus 2:11) "And it was in those days that Moses grew, and he went out to his brothers and he saw their toils," and (bid. 12) "And he turned here and there (… and he smote the Egyptian, etc.") Because he devoted his life to them, they were called by his name. He devoted his life to the judges, and they were called by his name, viz. (Devarim 16:18) "Judges and officers shall you appoint for yourself in all of your gates." Now is justice not the L rd's? How, then, are we to understand "shall you appoint for yourself"? Because he devoted his life to them, they were called by his name. And whence is it derived that he devoted his life to them? From (Exodus 2:13-17) "And he went out on the second day … and he said "Who made you an officer and a judge over us? … And Pharaoh heard … And the priest of Midian had seven daughters … And the shepherds came and drove them away. Because he devoted his life to them, they were called by his name. The ninth (song): (II Chronicles 20:21) "And he (Yehoshafat) took counsel with the people, and he set up singes to the L rd and lauders of (His) majestic holiness. When they went out before the vanguard (of the army) they said; 'Give thanks to the L rd, for His lovingkindness is forever!'" Why is this thanksgiving different from all the other sin the Torah, where it is written "Give thanks to the L rd for (the good, for His lovingkindness is forever"? __ It is to say, as it were, that there is no rejoicing before Him over the destruction of the wicked. If over that of the wicked there is no rejoicing, how much more so (is there grief) over that of the righteous, one of whom is over and against the entire world, viz. (Mishlei 10:25) "And the righteous one is the foundation of the world." The tenth (song) in time to come, viz. (Isaiah 42;10) "Sing to the L rd a new song, His praise from the end of the earth (Ibid. 48:42) "Say: The L rd has redeemed His servant Jacob. All of the (other) songs are denominated in the feminine ("zoth"). Just as a female bears (and then travails again), so, the past salivations were followed by subjugation. But the future (ultimate) redemption will not be followed by subjugation — wherefore it is denominated in the masculine ("zeh" [viz. Isaiah 26:1]). As it is written (Jeremiah 30:6) "Ask now and see if a male has ever given birth. Why, then, do I see that every man puts his hands upon his loins (as a woman giving birth?") For just as a male does not bear (and thus travail), so, the future redemption will not be followed by subjugation. As it is written (Isaiah 45:17) "Israel will be saved by the L rd, an eternal salvation. You will not be ashamed or abashed forever."

R. Joshua b. Chanina based his lecture on the following passage (Deut. 28, 62) And it shall come to pass that as the Lord rejoiced over you to do you good, and to multiply you, so will the Lord rejoice over you to bring you to nought, and to destroy you. Let us see. Does the Holy One, praised be He! indeed rejoice over the downfall of the wicked? Behold, it is written (II Chr. 20, 21) As they went out before the armed array, and said, Give thanks unto the Lord; for unto everlasting endureth His kindness. Whereupon R. Jochanan said: "Why are the words for he is good, not inserted here? Because the Holy One, praised be He! rejoices not in the downfall of the wicked." And R. Jochanan said again: "What is the meaning of the passage (Ex. 14, 20) And the one came not unto the other all the night? This means that the angels of Heaven wanted to sing the usual song, when the Holy One, praised be He! said unto them: 'My creatures are drowning in the sea, and you want to sing songs!' " [Hence God rejoiceth not in such cases]. Said R. Jose b. Chanina: "He Himself does not rejoice over it, but He causeth others to rejoice over it. This could be proved by the above Passage, which is written Yassiss (He will make rejoice other), and it is not written, Yassuss (He Himself will rejoice)."

“Gone from the daughter of Zion is all her splendor. Her princes are like deer that have not found pasture; they went powerless before the pursuer” (Lamentations 1:6)
“Gone from the daughter [mibat] of Zion.” Min bat is written. Rabbi Aḥa said: We have one fine portion; that is the Holy One blessed be He, as it is written in His regard: “The Lord is my lot [menat ḥelki] and my portion” (Psalms 16:5). “All its splendor,” this is the Holy One blessed be He, as it is stated: “You are clothed in glory and splendor” (Psalms 104:1).¹¹⁹Thus, when the children were exiled (Lamentations 1:5), God was exiled too, as it were, as implied in Lamentations 1:6. Alternatively, “all its splendor,” this is the Sanhedrin, as it is written: “Might and splendor are her garments” (Proverbs 31:25).¹²⁰This is stated regarding the Torah. Since it is the Sanhedrin who interpret the Torah and translates it into practical terms, they are the ones who clothe Torah in glory and splendor. The term splendor in Lamentations can therefore also be interpreted as referring to the Sanhedrin. Alternatively, “all its splendor [hadarah],” these are Torah scholars, as it is written: “You shall rise before the aged and honor [vehadarta] the presence of a sage” (Leviticus 19:32). Alternatively, “all its splendor,” these are the priestly watches, as it is written: “Praising with the splendor of holiness” (II Chronicles 20:21).
Alternatively, “all its splendor,” these are the children. Rabbi Yehuda said: Come and see how dear children are before the Holy One blessed be He. The Sanhedrin was exiled, but the Divine Presence was not exiled with them. The priestly watches were exiled, but the Divine Presence was not exiled with them. When the children were exiled, the Divine Presence was exiled with them. That is what is written: “Her infants are led into captivity before the adversary.” Immediately, “gone from the daughter of Zion is all her splendor.”
“Her princes are like deer [that have not found pasture].”¹²¹Pasture is typically associated with sheep, not deer. Rabbi Yehuda said: When they are soft they are likened to sheep, as it is stated: “The sheep will graze as in their pasture” (Isaiah 5:17). When they are rigid they are likened to deer, as it is stated: “Her princes are like deer.”
Rabbi Simon in the name of Rabbi Shimon bar Abba and Rabbi Shimon ben Lakish in the name of Rabbi Yehoshua [said]: Just as these deer turn their faces away from one another during a heat wave,¹²²They race directly to a water source with no consideration for any other deer. so too the prominent among Israel would see a matter of transgression and would turn their faces away from it. The Holy One blessed be He said to them: ‘A time will come when I will do so to you.’
“They went powerless before the pursuer.” Rabbi Azarya said in the name of Rabbi Yehuda ben Rabbi Simon: When Israel performs the will of the Omnipresent, they add strength to the power on high, just as it says: “With God we will triumph” (Psalms 60:14). When Israel does not perform the will of the Omnipresent, they, as it were, exhaust the great power on high, as it is written: “You abandoned the Rock that begot you” (Deuteronomy 32:18). Rabbi Yehuda ben Rabbi Simon [said] in the name of Rabbi Levi ben Rabbi Tarfon: When Israel performs the will of the Holy One blessed be He, they add strength to the power on high, just as it says: “Now, please, let the power of the Lord be great” (Numbers 14:17). When Israel does not perform the will of the Holy One blessed be He, they, as it were, exhaust the great power on high, and they, too, go “powerless before the pursuer.”
Rabbi Huna, Rabbi Aḥa, and Rabbi Simon in the name of Rabbi Shimon ben Lakish, and the Rabbis in the name of Rabbi Ḥanina: A person would say to his counterpart in Jerusalem: ‘Read one Bible column to me,’ and he would say to him: ‘I do not have the strength.’ ‘Teach me one chapter of Mishna,” and he would say to him: ‘I do not have the strength.’ The Holy One blessed be He said to them: ‘A time will come and I will do so to you.’
“They went powerless before the pursuer [rodef].” Rabbi Aḥa said: Just as Israel was exiled only by a full-fledged pursuer, so, they will be redeemed only with a full-fledged redeemer, as it is written: “A redeemer [goel] will come to Zion” (Isaiah 59:20), it is written full.¹²³The Hebrew word is written with a vav, just as the word rodef in the verse in Lamentations is written with a vav, despite the fact that both could have been written without the vav.

“Jerusalem has committed a sin, therefore she has become a pariah. All who honored her demean her because they have seen her nakedness. She, too, sighed and turned back” (Lamentations 1:8).
“Jerusalem has committed a sin.” Do the nations of the world not sin? Rather, even though they sin, it is nothing.¹³⁰They are not held to account as severely as Israel. This is due to Israel’s elevated status and its covenant with God. However, Israel sinned and was punished. “Therefore she has become a pariah [lenida],” she has become itinerant.¹³¹Nad, means wandering, itinerant. “All who honored her demean her because they have seen her nakedness. She, too, sighed and turned back,” back from the priesthood, back from kingship.

(I. Kings 22, 36) And there went a rinah (song) throughout the camp. R. Acha b. Chanina said (Prov. 11, 10) And when the wicked perish there is rinah; i.e., when Achab, the son of Omri, perished, there was rinah. Is this so? Does then the Lord rejoice over the downfall of the wicked? Behold it is written (II Chron. 20, 21) As they went out before the armed array and said: Give thanks unto the Lord; for unto everlasting endureth His kindness. And R. Jochanan said:"Why is it not said here He is good? Because the Holy One, praised be He! does not rejoice over the downfall of the wicked;" for R. Samuel b. Nachman said in the name of R. Jochanan: "What is the meaning of the passage (Ex. 14, 20) And the one came not near unto the other all the night; i.e., at that time the ministering angels wanted to sing their usual song before the Holy One, praised be He! but He said to them: 'My creatures (the Egyptians) are perishing in the sea, and ye want to sing.' " R. Jose b. Chanina said: "He Himself does not rejoice, but He causes others to rejoice. This can be proved from the following passage (Deut. 28, 63) And it shalt come to pass that as the Lord rejoiced, etc. It is written Yasiss (cause others to rejoice) and not Yassus, will rejoice Himself."

Similarly, it is written concerning Jehoshaphat: And when he had taken counsel with the people, he appointed them that should sing unto the Lord, and praise in the beauty of holiness, as they went out before the army, and say: “Give thanks unto the Lord, for His mercy endureth forever” (II Chron. 20:21). What is the difference between this song of praise and others found in the Torah? In all the other songs, For He is good is added, but in this instance For He is good is omitted, since there can be no rejoicing before Him on High over the destruction of the wicked. And since there could be no rejoicing before Him over the destruction of the wicked, surely there could be no joy at the destruction of the righteous, a single one of whom is equal to all the world in His sight. Hence it is said: But the righteous is an everlasting foundation (Prov. 10:25). The ninth song is the Song of Songs of Solomon. The tenth song is the song of the future: A psalm, O sing unto the Lord a new song; for He hath done marvelous things (Ps. 98:1).