מדרש אויף תהילים 96:1

“Daughters of Jerusalem,” the Rabbis say: Do not read it as “daughters of [benot] Jerusalem, but rather, builders of [bonot] Jerusalem. This is the Great Sanhedrin of Israel, which convenes and instructs them with regard to every question and judgment.
Another matter, “daughters of [benot] Jerusalem,” Rabbi Yoḥanan said: Jerusalem is destined to become a metropolis for all countries, and to draw [people] to it in streams, for its glory, as it is stated: “Ashdod, its towns, [benoteha] and its surrounding areas; Gaza, its towns, and its surrounding areas up to”¹⁹²The word Lasha does not appear in the verse and its inclusion in the text of the midrash appears to be an error (Etz Yosef). (Joshua 15:47). This is the opinion of Rabbi Yoḥanan, as Rabbi Yoḥanan said: It is written: “I will give them to you as daughters [levanot] and not due to your covenant” (Ezekiel 16:61). What is “levanot”? Towns. What is “not due to your covenant”? It is not due to your contract, but rather due to My contract.¹⁹³It is not because you have kept all of the responsibilities incumbent upon you due to our covenant; it is rather a gift from Me. Alternatively, the nations who will come to show honor to Jerusalem are not just the ten nations promised to Abraham in the Covenant of the Pieces, but rather are additional nations (Etz Yosef). Rabbi Beivai said in the name of Rabbi Reuven: “Sing, barren one, [who did not bear]” (Isaiah 54:1). What song is there for barrenness? Rather, “sing, barren one,” who did not bear children for Gehenna.
Rabbi Berekhya said in the name of Rabbi Shmuel bar Naḥman: Israel was likened to a female, just as a female takes one-tenth of the property from her father and leaves, so, too, Israel inherited the land of the seven nations, which is one-tenth of the seventy nations. Because they inherited like a female, they sang songs in the feminine, as it is stated: “Then Moses and the children of Israel sang this song [hashira hazot]¹⁹⁴These terms are in the feminine form. to the Lord” (Exodus 15:1). But, in the future, they are destined to inherit like a male, who inherits all his father’s property; that is what is written: “From the eastern side to the western side, Judah, one portion” (Ezekiel 48:7). “Dan one portion…Asher one portion” (Ezekiel 48:1–2), and all of them so, and they speak in the masculine, as it is stated: “Sing to the Lord a new song [shir ḥadash]” (Psalms 96:1); shira ḥadasha is not written, but rather shir ḥadash.
Rabbi Berekhya and Rabbi Yehoshua ben Levi [said]: Why was Israel likened to a female? Just as a female loads and unloads,¹⁹⁵This means that she becomes pregnant and gives birth. loads and unloads, and then unloads and does not load again, so, too, Israel is enslaved and redeemed, enslaved and redeemed, and is then redeemed and is never enslaved again. In this world, because their trouble is like the trouble of a female who gives birth,¹⁹⁶Their redemption is not permanent. they sing songs in the feminine; however, in the World to Come, where their trouble is not like the trouble of one who gives birth, they sing songs in the masculine. That is what is written: “On that day this song [hashir] will be sung” (Isaiah 26:1).

(Numb. 8:5-6:) THEN THE LORD SPOKE <UNTO MOSES SAYING>: TAKE THE LEVITES. Let our master instruct us: How many strings were on the harp which the Levites played?³²Tanh. Numb. 3:7; Numb. R. 15:11} Thus did R. Judah teach:³³T‘Arakh. 2:7; ‘Arakh. 13b. There were seven (shB') strings on that harp, as stated (in Ps. 16:11): IN YOUR PRESENCE THERE IS FULLNESS (rt.: SB')³⁴Since the S here is a Hebrew sin in the unpointed text SB‘ is identical with ShB‘. OF JOY. Do not read <the word pointed as> sova' ("fullness") but <as> sheva' ("seven"). So also did David say (in Ps. 119:164): WITH SEVEN A DAY DO I PRAISE YOU.³⁵M. Pss. 81:3; PR 21:1. A more traditional translation of Ps. 119:164 would read: SEVEN TIMES A DAY DO I PRAISE YOU. Moreover, in the days of the Messiah it will be made with eight <strings>. Therefore David has stated concerning the instrumental music (in Ps. 6:1): FOR THE LEADER; WITH INSTRUMENTAL MUSIC ON THE EIGHT-STRINGED HARP. Furthermore in the age to come it will be made of ten <strings> as stated {SING TO GOD A NEW SONG…. }³⁶No Psalm has exactly these words but SING TO THE LORD A NEW SONG…. appears in Pss. 96:1; 98:1; and 149:1; as well as in Is. 42:10. [(in Ps. 144:9): O GOD, LET ME SING TO YOU A NEW SONG; LET ME PLAY FOR YOU ON A TEN-STRINGED HARP.] And who ordained them? Samuel and David. It is so stated (in I Chron. 9:22): DAVID AND SAMUEL THE SEER ORDAINED THEM IN THEIR OFFICE OF TRUST. Moreover, they <were the ones who> set up the divisions for singing. Now the Levites would stand on their platform and sing before the one who spoke for the world to come into being. See the love with which the Holy One loved the Levites. So from the beginning the Holy One chose them to serve him. Therefore, the Holy One said to Moses. Levites are extremely dear to me. Take them in my name for a position of authority. {Thus it is stated:} [From where is it shown? From what they read on the matter] (in Numb. 8:6): TAKE THE LEVITES.

"To the conductor, a wise psalm of the sons of Korah. God, we have heard with our ears. This is what the scripture says (Isaiah 63:12), 'He led them with the right hand of Moses, etc.' From here we learn that when the Israelites left Egypt, they did not have any deeds that would redeem them, and it was not because of their ancestors that the sea was split, but rather to make a name for God. Similarly, it says (Ibid. 14), 'As the cattle go down into the valley.' And when they were redeemed from Egypt, Moses told them that they were not redeemed because of their own deeds, but rather so that they could tell their children and give glory to God among the nations. As it says (Psalm 96:1), 'Sing unto the Lord a new song.' (Ibid. 3), 'Declare His glory among the nations.' And the sons of Korah said to our ancestors, 'Tell us,' but they themselves also recount how they left Egypt. And what is the glory of the Holy One, blessed be He, that His children recount His glory among the nations? It is that they prophesied about the generations. The sons of Korah said to our ancestors, 'You did it, not us, what benefit do we have in what you did for our ancestors?' And when do we benefit? When you do a sign with me for good (Psalm 86:17), 'Do a sign with me for good.' The patriarchs worked a great deed in the days of Abraham, as it says (Genesis 15:15), 'And he divided himself against them by night.' Similarly, in the wilderness, the children did a deed for themselves and for their own desire, not for us. And it says (Psalm 47:3), 'God has chosen for us our inheritance.' "