20 And Benaiah the son of Jehoiada, son of a valiant man, great in exploits, of Kabzeel: he it was that smote two lions of Moab; and he went down and smote a lion in the midst of a pit on a snowy day. 21 He also smote the Egyptian, an imposing man: and the Egyptian had a spear in his hand; and he went down to him with a staff, and plucked the spear out of the Egyptian's hand, and slew him with his own spear. 22 These things did Benaiah the son of Jehoiada, and he had a name among the three mighty men. 23 He was honoured above the thirty, but he did not attain to the [first] three. And David set him in his council.
Matthew Henry's Commentary on 2 Samuel 23:20-23
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.