13 And three of the thirty went down at the start of the grain-cutting, and they came to David at the strong place of Adullam; and the band of Philistines had taken up their position in the valley of Rephaim. 14 And at that time David had taken cover in the strong place, and an armed force of the Philistines was in Beth-lehem. 15 And David, moved by a strong desire, said, If only someone would give me a drink of water from the water-hole of Beth-lehem, by the doorway into the town! 16 And the three men, forcing their way through the Philistine army, got water from the water-hole of Beth-lehem, by the doorway into the town, and took it back to David: but he would not take it, but, draining it out, made an offering of it to the Lord. 17 And he said, Far be it from me, O Lord, to do this; how may I take as my drink the life-blood of men who have put their lives in danger? So he would not take it. These things did the three great men of war.
Matthew Henry's Commentary on 2 Samuel 23:13-17
Commentary on 2 Samuel 23:8-39
(Read 2 Samuel 23:8-39)
David once earnestly longed for the water at the well of Bethlehem. It seems to be an instance of weakness. He was thirsty; with the water of that well he had often refreshed himself when a youth, and it was without due thought that he desired it. Were his valiant men so forward to expose themselves, upon the least hint of their prince's mind, and so eager to please him, and shall not we long to approve ourselves to our Lord Jesus, by ready compliance with his will, as shown us by his word, Spirit, and providence? But David poured out the water as a drink-offering to the Lord. Thus he would cross his own foolish fancy, and punish himself for indulging it, and show that he had sober thoughts to correct his rash ones, and knew how to deny himself. Did David look upon that water as very precious which was got at the hazard of these men's blood, and shall not we much more value those benefits for purchasing which our blessed Saviour shed his blood? Let all beware of neglecting so great salvation.