1 Chronicles 11:16-19

11:16 David was in the stronghold at the time, while a Philistine garrison was in Bethlehem. 11:17 David was thirsty and said, “How I wish someone would give me some water to drink from the cistern in Bethlehem near the city gate!” 11:18 So the three elite warriors broke through the Philistine forces and drew some water from the cistern in Bethlehem near the city gate. They carried it back to David, but David refused to drink it. He poured it out as a drink offering to the Lord 11:19 and said, “God forbid that I should do this! Should I drink the blood of these men who risked their lives?” Because they risked their lives to bring it to him, he refused to drink it. Such were the exploits of the three elite warriors.