1 Chronicles 11:4-6

David and all Israel went to Jerusalem (it was the old Jebus, where the Jebusites lived). The citizens of Jebus told David, “No trespassing—you can’t come here.” David came on anyway and captured the fortress of Zion, the City of David. David had said, “The first person to kill a Jebusite will be commander-in-chief.” Joab son of Zeruiah was the first; and he became the chief.