מדרש אויף תהילים 45:1

R. Shimon b. Yochai says (Psalms 16:11) "sated (sova) with joys in Your presence": Rend it not "sova," but "sheva" (seven). To seven "joys" the faces of the righteous are likened in time to come: the sun, the moon, the firmament, the stars, lightnings, lilies, the menorah of the Temple: the sun and the moon — (Song of Songs 6:10) "beauteous as the moon, clear as the sun." the firmament and the stars — (Daniel 12:3) "The wise will shine like the radiance of the firmament, and the turners of the many to righteousness, like the stars, forever and ever." lightnings — (Nachum 2:5) "and they flash like lightning." lillies (Psalms 45:1) "For the chief musician, on the lillies." the menorah of the Temple — (Hoshea 14:7) "and his glory will be like the olive tree." And (Zechariah 4:3) "There are two olive trees over it (the Temple menorah), one at the right of the bowl and one at the left."

Another thing to the conductor, to serve God. What did David see fit to say to the servant of God? To teach you that anyone who repents for their sins, the Almighty adds honor to them and calls them a beloved name. Come and see this in the case of the sons of Korah: until they repented, they were not called beloved, but after they repented, they were called beloved (Psalms 45:1). To the conductor, on Shoshanim. When they repented, they were called friends, as it says, "To the conductor, on the Shoshanim, for the sons of Korah, a maskil, a song of friendship" (Psalms 47:1). You also find this with David, as until he repented, he was not included in the upper assembly, but after he repented, he was included in the upper assembly and was called the servant of God, to the conductor, for the servant of God. You will find that anyone who calls themselves a servant, the Almighty calls them a servant. Abraham called himself a servant (Genesis 18:3), "My lord, if now I have found favor in your sight, do not pass on by your servant." And the Almighty called him a servant (Genesis 26:24), "Because Abraham obeyed Me and kept My charge, My commandments, My statutes, and My laws." Jacob called himself a servant (Genesis 32:11), "I am not worthy of all the mercies, and of all the truth, which You have shown to Your servant." And the Almighty called him a servant (Isaiah 44:1), "But now listen, O Jacob, My servant." Moses called himself a servant (Deuteronomy 3:24), "O Lord God, You have begun to show Your servant Your greatness and Your mighty hand." And the Almighty called him a servant (Numbers 12:7), "Not so with My servant Moses." David called himself a servant (Psalms 116:16), "Truly, I am Your servant, the son of Your maidservant." And the Almighty called him a servant (2 Samuel 3:18), "By the hand of David, My servant, I will save." And there were those who did not call themselves servants, but the Almighty called them servants. Isaac did not call himself a servant, but the Almighty called him a servant (Exodus 32:13), "Remember Abraham, Isaac, and Israel, Your servants." Joshua did not call himself a servant, but he was called a servant (Joshua 24:29), "And Joshua, the son of Nun, the servant of the Lord, died.

Another matter: “You shall take for you” – that is what is written: “Inform me of the way of life, abundant joy” (Psalms 16:11). David said before the Holy One blessed be He: Inform me which gate leads directly to life in the World to Come. Rabbi Yudan said: The Holy One blessed be He said to David: If it is life that you need, you need suffering [yisurin], as it is written: “Rebukes of admonition [musar] are the way of life” (Proverbs 6:23).
“Abundant joy [sova semaḥot]” (Psalms 16:11) – He satisfied us [sabenu] with five joys [semaḥot]: Bible, Mishna, Talmud, Tosefta, and aggada. Alternatively, “abundant joy in Your presence” (Psalms 16:11) – these are the seven groups of righteous people who are destined to receive the Divine Presence, and their faces are similar to the sun, the moon, the firmament, the stars, lightning, lilies, and the pure candelabrum⁸The candelabrum that was made of pure gold. that was in the Temple. To the sun, from where is it derived? As it is stated: “Pure like the sun” (Song of Songs 6:10). The moon, from where is it derived? As it is stated: “Fair like the moon” (Song of Songs 6:10). The firmament, from where is it derived? As it is stated: “The wise will shine like the radiance of the firmament” (Daniel 12:3). The stars, from where is it derived? As it is written: “Those who lead the multitudes to righteousness, like the stars, forever and ever” (Daniel 12:3). Lightning, from where is it derived? As it is stated: “Their appearance is like torches, they romp like lightning” (Nahum 2:5). Lilies, from where is it derived? As it is stated: “For the conductor, for lilies” (Psalms 45:1). The pure candelabrum, from where is it derived? As it is stated: “He said to me: What do you see? I said: I saw, and behold, a candelabrum of gold in its entirety” (Zechariah 4:2).
“Eternal pleasure [ne’imot] is by Your right hand” (Psalms 16:11). Who will inform us which group is the most beloved and delightful [hane’ima] among them? There are two amora’im; one said: The one that comes from the power of Torah and from the power of mitzvot. The other said: These are the Bible teachers and the Mishna teachers, who teach children accurately, as they are destined to stand to the right of the Holy One blessed be He. That is what is written: “Eternal pleasure is by Your right hand.”
Another matter: “Sova semaḥot” (Psalms 16:11) – do not read it so, but rather, as “seven [sheva] celebrations [semaḥot]”; these are the seven mitzvot of the festival of Sukkot, and these are: The four species of the palm branch, sukka, the festival peace offerings, and the peace offerings of rejoicing. If [one brings] festival offerings, why [also] offerings of rejoicing; if offerings of rejoicing, why festival offerings? Rabbi Avin said: This is analogous to two [litigants] who came before a judge and we do not know who prevailed. But if one comes and takes palm branches in his hand we know that he is the one who prevailed. So, Israel and the nations of the world litigate before the Holy One blessed be He on Rosh HaShana, and we do not know who prevailed. But when Israel emerges from before the Holy One blessed be He with their palm branches and their citrons in their hands, we know that it is Israel that emerged victorious. Therefore, Moses exhorts Israel and says to them: “You shall take for you on the first day.”