2 Samuel 23:17-18

17He said, ‘Lord, it is not right for me to drink this water. It would seem like the blood of the men who fetched it for me. The Philistines might have killed them on the way.’ So David refused to drink it. Those were some of the great things that the three brave soldiers did.

18Abishai was the leader of David's 30 great soldiers. He was the brother of Zeruiah's son Joab. One time, he used his spear to fight 300 men and he killed them all. So he became as famous as the ‘Three Brave Soldiers’.