Jebus

trodden hard, or fastness, or "the waterless hill", the name of
the Canaanite city which stood on Mount Zion (Josh. 15:8;
18:16, 28). It is identified with Jerusalem (q.v.) in Judg.
19:10, and with the castle or city of David (1 Chr. 11:4,5). It
was a place of great natural strength, and its capture was one
of David's most brilliant achievements (2 Sam. 5:8).