1 Chronicles 11:5-7

New International Version - UK

⁵ said to David, ‘You will not get in here.’ Nevertheless, David captured the fortress of Zion – which is the City of David.

⁶ David had said, ‘Whoever leads the attack on the Jebusites will become commander-in-chief.’ Joab son of Zeruiah went up first, and so he received the command.

⁷ David then took up residence in the fortress, and so it was called the City of David.