2 Samuel 5:6-7

6King David and his soldiers marched to Jerusalem. They went to attack the Jebusites who lived there. The Jebusites said to David, ‘You will never get into our city. Even blind men and those who are lame could keep you out.’ They thought, ‘David will never get in here.’

7But David did get in and he took Zion, the city's strong place. It is now called ‘The City of David’.