5 And the king ordered Jo'ab and Abi'shai and It'tai, "Deal gently for my sake with the young man Ab'salom." And all the people heard when the king gave orders to all the commanders about Ab'salom. 6 So the army went out into the field against Israel; and the battle was fought in the forest of E'phraim. 7 And the men of Israel were defeated there by the servants of David, and the slaughter there was great on that day, twenty thousand men. 8 The battle spread over the face of all the country; and the forest devoured more people that day than the sword.
9 And Ab'salom chanced to meet the servants of David. Ab'salom was riding upon his mule, and the mule went under the thick branches of a great oak, and his head caught fast in the oak, and he was left hanging between heaven and earth, while the mule that was under him went on. 10 And a certain man saw it, and told Jo'ab, "Behold, I saw Ab'salom hanging in an oak." 11 Jo'ab said to the man who told him, "What, you saw him! Why then did you not strike him there to the ground? I would have been glad to give you ten pieces of silver and a girdle." 12 But the man said to Jo'ab, "Even if I felt in my hand the weight of a thousand pieces of silver, I would not put forth my hand against the king's son; for in our hearing the king commanded you and Abi'shai and It'tai, 'For my sake protect the young man Ab'salom.' 13 On the other hand, if I had dealt treacherously against his life (and there is nothing hidden from the king), then you yourself would have stood aloof." 14 Jo'ab said, "I will not waste time like this with you." And he took three darts in his hand, and thrust them into the heart of Ab'salom, while he was still alive in the oak. 15 And ten young men, Jo'ab's armor-bearers, surrounded Ab'salom and struck him, and killed him.
Matthew Henry's Commentary on 2 Samuel 18:5-15
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.