I Chronicles 11:10-19

Now these were the heads of the mighty men whom David had, who strengthened themselves with him in his kingdom, with all Israel, to make him king, according to the word of the LORD concerning Israel. And this is the number of the mighty men whom David had: Jashobeam the son of a Hachmonite, chief of the captains; he had lifted up his spear against three hundred, killed by him at one time. After him was Eleazar the son of Dodo, the Ahohite, who was one of the three mighty men. He was with David at Pasdammim. Now there the Philistines were gathered for battle, and there was a piece of ground full of barley. So the people fled from the Philistines. But they stationed themselves in the middle of that field, defended it, and killed the Philistines. So the LORD brought about a great victory. Now three of the thirty chief men went down to the rock to David, into the cave of Adullam; and the army of the Philistines encamped in the Valley of Rephaim. David was then in the stronghold, and the garrison of the Philistines was then in Bethlehem. And David said with longing, “Oh, that someone would give me a drink of water from the well of Bethlehem, which is by the gate!” So the three broke through the camp of the Philistines, drew water from the well of Bethlehem that was by the gate, and took it and brought it to David. Nevertheless David would not drink it, but poured it out to the LORD. And he said, “Far be it from me, O my God, that I should do this! Shall I drink the blood of these men who have put their lives in jeopardy? For at the risk of their lives they brought it.” Therefore he would not drink it. These things were done by the three mighty men.