1 Chronicles 11:15-19

15There were 30 leaders among David's soldiers. Three of them went to be with David at Adullam's cave where there was a big rock. A group of Philistine soldiers had made their camp in Rephaim valley.

16David was in his strong safe place. A group of Philistine soldiers had made their home in Bethlehem.

17David was very thirsty. He said, ‘I want someone to bring water from the well near Bethlehem's gate for me to drink.’

18So the three soldiers fought through the Philistine camp and they reached Bethlehem's gate. They took some water from the well there and they carried it back to David. But he refused to drink it. He poured it on the ground as an offering to the Lord.

19He said, ‘God knows that it is not right for me to drink this water. It would seem like the blood of the brave men who fetched it for me. The Philistines might have killed them on the way.’ So David refused to drink it. That was one of the great things that those three brave soldiers did.