Midrash su Salmi 118:27

... Teach us, our master, from when does the mitzvah of the Channukah lamp begin? Our rabbis taught – from when the sun sets until the majority of people are gone from the marketplace. And where are they to be lit? If one lives on an upper floor with a window facing the public domain, light there. If it is a time of danger, light within your house [and it is forbidden to do work by its light. R’ Asi said] it is forbidden to see by its light. Why do we light Channukah lamps? When the Hasmonean High Priest defeated the Greeks, as it says “For I bend Judah for Me like a bow; I filled [the hand of] Ephraim, and I will arouse your children, O Zion, upon your children, O Javan; and I will make you as the sword of a mighty man,” (Zechariah 9:13) they entered the Holy Temple. They found there eight iron stakes, fixed them in the ground and lit lamps upon them. Why do we read the Hallel psalms of praise? Because it is written “The Lord is God, and He gave us light.” (Tehillim 118:27) Why don’t we read it on Purim? It is written “…to destroy, to slay, and to cause to perish the entire host of every people and province that oppress them…” (Esther 8:11) and we don’t read it except to mark the fall of a kingdom and the kingdom of Ahasuerus still stood. But when the Holy One destroyed the kingdom of Greece they began to sing hymns and praises and to say that in the past we were servants to Pharoah, servants to Greece and now we are servants to the Holy One “Praise, you servants of the Lord…” (Tehillim 113:1) How many channukot (dedications) were there? There were seven. The dedication of heaven and earth, as it says “Now the heavens and the earth were completed…” (Bereshit 2:1) What dedication was there then? “And God placed them in the expanse of the heavens to shed light upon the earth.” (Bereshit 1:17) The dedication of the wall, as it says “And in the dedication of the wall of Jerusalem…” (Nechemiah 12:27) The dedication of those who came up from the exile, as it says “And they offered up for the dedication of this House of God…” (Ezra 6:17) The dedication of the priests, which we light for. The dedication of the world to come, as it says “And it shall come to pass on that day, that I will search Jerusalem with candles…” (Tzephaniah 1:12) The dedication of the princes “This was the dedication offering of the altar…” (Bamidbar 7:84) The dedication of the Sanctuary, which this is speaking of “A psalm; a song of dedication of the House, of David.” (Tehillim 30:1) Another explanation. There are seven channukot. The dedication of the creation of the world, as it is written “Now the heavens and the earth were completed…” (Bereshit 2:1) Completion is the language of dedication, as is written “All the work of the Mishkan of the Tent of Meeting was completed…” (Shemot 39:32) The dedication of Moshe, as it is written “And it was that on the day that Moses finished erecting the Mishkan…” (Bamidbar 7:1) The dedication of the House, as it is written “A psalm; a song of dedication of the House, of David.” (Tehillim 30:1) The dedication of the Second Temple [as it says “And they offered up for the dedication of this House of God…” (Ezra 6:17) and the dedication of the wall] as it says “And in the dedication of the wall of Jerusalem…” (Nechemiah 12:27) The current one of the House of Hasmonean. The dedication of the world to come, because even that has lights, as it is written “And the light of the moon shall be like the light of the sun, and the light of the sun shall be seven-fold as the light of the seven days…” (Isaiah 30:26)

"This is my G d and I will extol Him": R. Eliezer says: Whence is it derived that a maid-servant beheld at the Red Sea what was not beheld by Ezekiel and the other prophets, of whom it is written (Hoshea 12:11) "And to the prophets I appeared (in various) guises," and (Ezekiel 1:1) "The heavens opened and I saw visions of G d"? An analogy: A king of flesh and blood comes to a province, a circle of guards around him, warriors at his right and at his left, armies before him and behind him — and all asking "Who is the king?" For he is flesh and blood as they are. But when the Holy One was revealed at the sea, there was no need for anyone to ask "Who is the King?" For when they saw Him, they knew Him, and they all opened and said "This is my G d, and I will extol Him ("ve'anvehu," lit.: "I will 'host' Him")!" R. Yishmael says: Is it possible to "host" one's Master? Rather, (read "ve'anvehu" as) "I shall beautify myself (from the root "na'eh") before Him with mitzvoth — with a beautiful lulav, beautiful tzitzith, a beautiful shofar, beautiful prayer. Abba Shaul says: "I will liken myself to Him" (i.e., "ve'anvehu" = ani vehu ["I and He"]) Just as He is merciful and gracious, you, too, be merciful and gracious. R. Yossi Haglili says; "Beautify and praise the Holy One Blessed be He before all the peoples of the world." R. Yossi b. Dormaskith says: "I shall make a Temple before Him," "navth" being the Temple, as in (Psalms 79:7) "and they have destroyed navehu" (His Temple)", and (Isaiah 33:20) "But you will regard (with deference) Zion, the city of our assemblies. Your eyes will see Jerusalem, the peaceful habitation" (neveh sha'anan). R. Akiva says: "I shall speak of His beauty" — of the praise of the Holy One Blessed be He, who spoke and brought the world into being. The peoples of the world ask Israel (Song of Songs 5:9) "How is your Beloved (different) from the beloved (of all the other nations) that you have thus besworn us? (see Ibid. 8) that you thus die for Him and are thus murdered for Him, viz. (Ibid. 1:3) "alamoth have loved You" — they have loved You "al maveth" ("above death"), and (Psalms 44:23) "for over You we are slain all the day"? You are comely, you are strong. Come and join us. And Israel says to them: Do you know Him? Let us tell you part of His praise (Song of Songs 5:10) "My Beloved is white and ruddy, distinguished among legions." When they hear this, they say to Israel: Let us go with you, viz. (Ibid. 6:1) "Where did your Beloved go, you loveliest among the women? Whither has your Beloved turned? Let us seek Him with you." And Israel says to them (Ibid. 2:16) "My Beloved is mine, and I am His," and (Ibid. 6:3) "I am my Beloved's, and my Beloved is mine, who grazes His flock among the lilies." And the sages say (on "ve'anvehu"): "I shall accompany Him ("alavenhu") until I come with Him to His Temple. An analogy: A king's son goes abroad — he goes after him and attends upon him. He goes to a different city — he goes after him and attends upon him. Thus with Israel. When they went down to Egypt, the Shechinah was with them, viz. (Genesis 46:4) "I shall go down with you to Egypt." When they went up, the Shechinah went up with them, viz. (Ibid.) "and I shall also bring you up." When they went down to the sea, the Shechinah was with them, viz. (Exodus 14:19) "And the angel of G d, who went before the camp of Israel, etc." When they went out to the desert, the Shechinah was with them, viz. (Ibid. 13:21) "And the L rd went before them by day, etc." — until they brought Him with them to His holy Temple, viz. (Song of Songs 3: "I had almost passed them (Moses and Aaron) by, when I found Him whom my soul loved. I held onto Him and did not let go of Him until I had brought Him to the house of my mother and the chamber of my conception." "my G d" (Keli): With me He manifested the attribute of mercy, and with my fathers, the attribute of justice. And whence is it derived that "keli" connotes the attribute of mercy? From (Psalms 22:2) "Keli, Keli, why have You forsaken me?" and (Numbers 12:13) "Kel, I pray You, heal her, I pray You," and (Psalms 118:27) "The L rd is 'Kel,' and He has lighted (the way) for us." And whence is it derived that "Elokim" (as in [Exodus, Ibid] "the G d ['Elokei'] of my father") connotes justice? From (Devarim 1:17) "For the judgment is to 'Elokim.'" "the G d of my father, and I will exalt Him": I am a queen, the daughter of kings; a beloved one, the daughter of beloved ones; a holy one, the daughter of holy ones; a pure one, the daughter of pure ones. An analogy: A man goes to betroth a woman. Sometimes he is embarrassed in her; sometimes, in her kin. But I am not so, but a queen, the daughter of kings, etc. R. Shimon b. Elazar says: When Israel do the will of the L rd, His name is exalted in the world, as it is written (Joshua 5:1) "And it was, when all the kings of the Emori heard, etc." And thus did Rachav say to Joshuah's emissaries, (Ibid. 2:10) "for we heard how the L rd dried up, etc.", and (Ibid. 17) "and we heard and our hearts melted, and no man's spirit endured within him before you. For the L rd, He is G d in the heavens above, etc." And when they do not do His will, His name, as it were, is demeaned in the world, viz. (Ezekiel 36:20) "And they came to the nations … and they profaned My holy name when it was said of them: These are the peoples of the L rd, and from His land did they go forth …" and (Ibid. 23) "And I shall sanctify My great name which has been profaned among the nations, etc." "the G d of my father, and I will exalt Him": The congregation of Israel said before the Holy One Blessed be He: L rd of the world, it is not for the miracles that You performed with Me that I chant song before You, but for the miracles that You performed with my fathers and with me in all of the generations — thus: "This is my G d and I will extol Him; the G d of my father, and I will exalt Him."

Why do we light candles on Hanukkah? Only because when the sons of Hashmonai the High Priest were victorious over the Greeks, as it is written “And I will arouse your sons, O Zion, against your sons, O Javan...” (Zechariah 9:13) they entered the Temple, they found there eight spears of iron; they affixed them and lit lamps in them. And why do we say Hallel? Because it includes the verse, “The LORD is God; He has given us light...” (Psalms 118:27).