2 Samuel 23:13-17

13And three of the thirty chiefs went down, and came to David in the harvest time to the cave of Adullam, when the troop of the Philistines was encamped in the valley of Rephaim.

14And David was then in the stronghold; and the Philistines' garrison was then at Bethlehem.

15And David longed, and said, Oh that one would give me to drink of the water of the well of Bethlehem, which is in the gate!

16And the three mighty men broke through the camp of the Philistines, and drew water out of the well of Bethlehem, which is in the gate, and took it, and brought it to David; however he would not drink of it, but poured it out to Jehovah.

17And he said, Be it far from me, Jehovah, that I should do this thing! is it not the blood of the men that went at the risk of their lives? Therefore he would not drink it. These things did the three mighty men.