And David dwelled in the castle; therefore they called it the city of David.
Psalm 2:6 Yet have I set my king on my holy hill of Zion.
the city of David that is, Zion
1 Chronicles 11:5 And the inhabitants of Jebus said to David, You shall not come here. Nevertheless David took the castle of Zion...
2 Samuel 5:7 Nevertheless David took the strong hold of Zion: the same is the city of David.