11 Next to him was Shammah son of Agee the Hararite. When the Philistines banded together at a place where there was a field full of lentils, Israel’s troops fled from them. 12 But Shammah took his stand in the middle of the field. He defended it and struck the Philistines down, and the Lord brought about a great victory.
13 During harvest time, three of the thirty chief warriors came down to David at the cave of Adullam, while a band of Philistines was encamped in the Valley of Rephaim. 14 At that time David was in the stronghold, and the Philistine garrison was at Bethlehem. 15 David longed for water and said, “Oh, that someone would get me a drink of water from the well near the gate of Bethlehem!” 16 So the three mighty warriors broke through the Philistine lines, drew water from the well near the gate of Bethlehem and carried it back to David. But he refused to drink it; instead, he poured it out before the Lord. 17 “Far be it from me, Lord, to do this!” he said. “Is it not the blood of men who went at the risk of their lives?” And David would not drink it.
Such were the exploits of the three mighty warriors.
David poured out the water as an offering to God. There had been so much sacrifice of life during battle. The water represented the lives of the soldiers who lost their lives in battle. These men gave themselves to serve David. When you serve others, you are also serving God.