2 and David sendeth the third of the people by the hand of Joab, and the third by the hand of Abishai, son of Zeruiah, brother of Joab, and the third by the hand of Ittai the Gittite, and the king saith unto the people, 'I certainly go out—I also—with you.'

Matthew Henry's Commentary on 2 Samuel 18:2

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.