2 Samuel 5:7-9

But David captured the fortress of Zion, which is now called the City of David. On the day of the attack, David said to his troops, “I hate those ‘lame’ and ‘blind’ Jebusites. Whoever attacks them should strike by going into the city through the water tunnel.” That is the origin of the saying, “The blind and the lame may not enter the house.” So David made the fortress his home, and he called it the City of David. He extended the city, starting at the supporting terraces and working inward.