2 Samuel 23:12-16

But he stood in the midst of the ground, and defended it, and slew the Philistines: and the LORD wrought a great victory.

And three of the thirty chief went down, and came to David in the harvest time unto the cave of Adullam: and the troop of the Philistines pitched in the valley of Rephaim.

And David was then in an hold, and the garrison of the Philistines was then in Beth-lehem.

And David longed, and said, Oh that one would give me drink of the water of the well of Beth-lehem, which is by the gate!

And the three mighty men brake through the host of the Philistines, and drew water out of the well of Beth-lehem, that was by the gate, and took it, and brought it to David: nevertheless he would not drink thereof, but poured it out unto the LORD.