1 Chronicles 11:15-17

15Three of the thirty chiefs came down to David to the rock at the cave of Adullam, while a band of Philistines was encamped in the Valley of Rephaim. 16At that time David was in the stronghold, and the Philistine garrison was at Bethlehem. 17David longed for water and said, “Oh, that someone would get me a drink of water from the well near the gate of Bethlehem!”