181 And David numbered the people that were with him, and set captains of thousands and captains of hundreds over them. 2 And David sent forth the people, a third part under the hand of Joab, and a third part under the hand of Abishai the son of Zeruiah, Joab's brother, and a third part under the hand of Ittai the Gittite. And the king said unto the people, I will surely go forth with you myself also. 3 But the people said, Thou shalt not go forth: for if we flee away, they will not care for us; neither if half of us die, will they care for us: but thou art worth ten thousand of us; therefore now it is better that thou be ready to succor us out of the city. 4 And the king said unto them, What seemeth you best I will do. And the king stood by the gate-side, and all the people went out by hundreds and by thousands. 5 And the king commanded Joab and Abishai and Ittai, saying, Deal gently for my sake with the young man, even with Absalom. And all the people heard when the king gave all the captains charge concerning Absalom. 6 So the people went out into the field against Israel: and the battle was in the forest of Ephraim. 7 And the people of Israel were smitten there before the servants of David, and there was a great slaughter there that day of twenty thousand men. 8 For the battle was there spread over the face of all the country; and the forest devoured more people that day than the sword devoured.
Matthew Henry's Commentary on 2 Samuel 18:1-8
Commentary on 2 Samuel 18:1-8
(Read 2 Samuel 18:1-8)
How does David render good for evil! Absalom would have only David smitten; David would have only Absalom spared. This seems to be a resemblance of man's wickedness towards God, and God's mercy to man, of which it is hard to say which is most amazing. Now the Israelites see what it is to take counsel against the Lord and his anointed.