1 Chronicles 11:7
"And David dwelt in the castle; therefore they called it the city of David."
Cross References (ranked by relevance)
2 Samuel 5:7
Nevertheless David took the strong hold of Zion: the same is the city of David.
Psalm 2:6
Yet have I set my king upon my holy hill of Zion.
1 Chronicles 11:5
And the inhabitants of Jebus said to David, Thou shalt not come hither. Nevertheless David took the castle of Zion, which is the city of David.