Charles Ellicott Commentary 1 Chronicles 11:5

"And the inhabitants of Jebus said to David, Thou shalt not come in hither. Nevertheless David took the stronghold of Zion; the same is the city of David." — 1 Chronicles 11:5 (ASV)

Thou shalt not come hither. —A jeer. (Compare to 2 Samuel 5:6) And one spoke to David, saying, Thou shalt not come in hither. The blind and the lame will have kept thee out! The Jebusites trusted in the strength of their fortress. Even the weakest defense would be sufficient to repel David’s assault.