מדרש על דברי הימים א 11:2

... David is the shepherd of Israel, as it says “You shall shepherd My people Israel…” (Divre HaYamim I 11:2) And who shepherded David? The Holy One, as it says “The Lord is my shepherd; I shall not want.” (Tehillim 23:1) Jerusalem is the light of the world, as it says “And nations shall go by your light…” (Yeshayahu 60:3) And who is the light of Jerusalem? The Holy One, as it is written “…but the Lord shall be to you for an everlasting light…” (Yeshayahu 60:19)