5 And the king gave orders to Joab and Abishai and Ittai, saying, Because of me, be gentle to the young man Absalom. And this order about Absalom was given in the hearing of all the people. 6 So the people went out into the field against Israel, and the fight took place in the woods of Ephraim. 7 And the people of Israel were overcome there by the servants of David, and there was a great destruction that day, and twenty thousand men were put to the sword. 8 And the fighting went on over all the face of the country: and the woods were responsible for more deaths than the sword.
9 And Absalom came across some of David's men. And Absalom was seated on his mule, and the mule went under the thick branches of a great tree, and his head became fixed in the tree and he was lifted up between earth and heaven, and the beast under him went on. 10 And a certain man saw it and said to Joab, I saw Absalom hanging in a tree. 11 And Joab said to the man who had given him the news, If you saw this, why did you not put your sword through him, and I would have given you ten bits of silver and a band for your robe? 12 And the man said to Joab, Even if you gave me a thousand bits of silver, I would not put out my hand against the king's son: for in our hearing the king gave orders to you and Abishai and Ittai, saying, Take care that the young man Absalom is not touched. 13 And if I had falsely put him to death (and nothing may be kept secret from the king), you would have had nothing to do with me.
Matthew Henry's Commentary on 2 Samuel 18:5-13
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.
Commentary on 2 Samuel 18:9-18
(Read 2 Samuel 18:9-18)
Let young people look upon Absalom, hanging on a tree, accursed, forsaken of heaven and earth; there let them read the Lord's abhorrence of rebellion against parents. Nothing can preserve men from misery and contempt, but heavenly wisdom and the grace of God.