I Chronicles 11:4-9 (NKJV)
[4] And David and all Israel went to Jerusalem, which is Jebus, where the Jebusites were, the inhabitants of the land.
[5] But the inhabitants of Jebus said to David, “You shall not come in here!” Nevertheless David took the stronghold of Zion (that is, the City of David).
[6] Now David said, “Whoever attacks the Jebusites first shall be chief and captain.” And Joab the son of Zeruiah went up first, and became chief.
[7] Then David dwelt in the stronghold; therefore they called it the City of David.
[8] And he built the city around it, from the Millo to the surrounding area. Joab repaired the rest of the city.
[9] So David went on and became great, and the LORD of hosts was with him.