2 Samuel 18:1-2
1-2David organized his forces. He appointed captains of thousands and captains of hundreds. 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."
3They 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."