1 Chronicles 11:15-19

15Three of the thirty chief men went down to David, to the rock at the cave of Adullam, while the Philistine army was encamped in Rephaim Valley.

16At that time David was in the stronghold, and a Philistine garrison was at Bethlehem.

17David was extremely thirsty and said, “If only someone would bring me water to drink from the well at the city gate of Bethlehem!”

18So the Three broke through the Philistine camp and drew water from the well at the gate of Bethlehem. They brought it back to David, but he refused to drink it. Instead, he poured it out to the Lord.

19David said, “I would never do such a thing in the presence of my God! How can I drink the blood of these men who risked their lives?” For they brought it at the risk of their lives. So he would not drink it. Such were the exploits of the three warriors.