1 Chronicles 11:15-17

15Three of the thirty chief men went down to the rock to David, into the cave of Adullam, while the army of the Philistines was camped in the Valley of Rephaim.

16David was then in the stronghold, while the garrison of the Philistines was in Bethlehem.

17David had a craving and said, “Oh that someone would give me a drink of water from the well of Bethlehem, which is next to the gate!”