20 And Benaiah son of Jehoiada (son of a man of valour, great in deeds from Kabzeel), he hath smitten two lion-like men of Moab, and he hath gone down and smitten the lion in the midst of the pit in a day of snow. 21 And he hath smitten the Egyptian man, a man of appearance, and in the hand of the Egyptian 'is' a spear, and he goeth down unto him with a rod, and taketh violently away the spear out of the hand of the Egyptian, and slayeth him with his own spear. 22 These 'things' hath Benaiah son of Jehoiada done, and hath a name among three mighty. 23 Of the thirty he is honoured, and unto the three he came not; and David setteth him over his guard.
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.