2 Samuel 5:6-7

Now the king and his men went to Jerusalem against the Jebusites, the inhabitants of the land, who said to David, “You shall not enter here, for the blind and the lame [even the weakest among us] will turn you away”; they thought, “David cannot come in here [because the walls are impenetrable].” Nevertheless, David captured the stronghold (fortress) of Zion, that is, the City of David.