2 Samuel 5:7-9

7Nevertheless, David took the stronghold of Zion, that is, the city of David.

8And David said on that day, "Whoever would strike the Jebusites, let him get up the water shaft to attack 'the lame and the blind,' who are hated by David's soul." Therefore it is said, "The blind and the lame shall not come into the house."

9And David lived in the stronghold and called it the city of David. And David built the city all around from the Millo inward.