2 Samuel 23:14-17

14And David was then in a strong hold, and the garrison of the Philistines was then in Bethlehem. 15And David longed, and said, O that one would give me drink of the water of the well of Bethlehem, which is by the gate! 16And the three mighty men broke through the host of the Philistines, and drew water out of the well of Bethlehem, that was by the gate, and took it, and brought it to David: nevertheless he would not drink of it, but poured it out to the LORD. 17And he said, Be it far from me, O LORD, that I should do this: is not this the blood of the men that went in jeopardy of their lives? therefore he would not drink it. These things did these three mighty men.