1 Chronicles 11:4-9

4Then David and all Israel went to Jerusalem (that is Jebus); and the Jebusites, the inhabitants of the land, were there.

5Then the Jebusites said to David, “You shall not come in here.” But David captured the stronghold of Zion (that is, the City of David).

6Now David said, “Whoever strikes down a Jebusite first shall be chief and commander.” Joab the son of Zeruiah [David’s half sister] went up first, and so he was made chief.

7Then David lived in the stronghold; so it was called the City of David.

8He built the city around it, from the Millo (fortification) to the surrounding area; and Joab repaired the rest of the [old Jebusite] city.

9David became greater and greater, for the Lord of hosts was with him.