Midrash su Salmi 24:5

“You gates, lift your heads…” (Tehillim 24:7/9) You find that at the time when Shlomo built the Holy temple he wanted to bring the ark into the Holy of Holies, but the gate was too small. It was five cubits long and two and a half cubits wide, while the ark was one and a half cubits long, one and a half wide and one and a half tall. Can’t one and a half cubits fit into two and a half?! Rather, at that moment the gates cleaved to one another. Shlomo said twenty four songs of joy and was not answered, he said ‘you gates lift up your heads’ and was not answered. He tried again and said “You] gates, lift your heads…so that the King of Glory may enter. Who is this King of Glory?” (Tehillim 24:7-8) He was not answered. Once he said “O Lord God, do not turn back the face of Your anointed one; remember the kind deeds of David Your servant,” (Divre HaYamim II 6:42) immediately the gates lifted up their heads, the ark entered and fire descended from heaven. Why did Shlomo suffer all of this? Because he was filled with pride and said “I have surely built You a house to dwell in…” (Melachim I 8:13) Since all of Israel saw this, they immediately said ‘it is certain that the Holy One has given atonement for that sin of David.’ Immediately their expression turned black like the bottom of a pot and they were ashamed. This is what is written “Grant me a sign for good, and let my enemies see [it] and be ashamed, for You, O Lord, have helped me and comforted me.” (Tehillim 86:17) ‘Helped me’ in this world and ‘comforted me’ in the world to come.

... 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)