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. 14 Then Joab said, I would have made it safe for you. And he took three spears in his hand, and put them through Absalom's heart, while he was still living, in the branches of the tree. 15 And ten young men, servants of Joab, came round Absalom and put an end to him.
Matthew Henry's Commentary on 2 Samuel 18:11-15
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.