181 David organized his forces. He appointed captains of thousands and captains of hundreds. 2 Then David deployed his troops, a third under Joab, a third under Abishai son of Zeruiah, Joab's brother, and a third under Ittai the Gittite. The king then announced, "I'm marching with you." 3 They said, "No, you mustn't march with us. If we're forced to retreat, the enemy won't give it a second thought. And if half of us die, they won't do so either. But you are worth ten thousand of us. It will be better for us if you stay in the city and help from there." 4 "If you say so," said the king. "I'll do what you think is best." And so he stood beside the city gate as the whole army marched out by hundreds and by thousands.
Matthew Henry's Commentary on 2 Samuel 18:1-4
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.