1 Chronicles 11:15-17

15Three of the thirty leaders went down to David at the rocky cliff at the cave of Adullam, while a Philistine force was camped in the Valley of Rephaim.

16David was in the stronghold at the time, while a Philistine garrison was in Bethlehem.

17David was thirsty and said, “How I wish someone would give me some water to drink from the cistern in Bethlehem near the city gate!”