2 Samuel 18:2

18:2 David then sent out the army – a third under the leadership of Joab, a third under the leadership of Joab’s brother Abishai son of Zeruiah, and a third under the leadership of Ittai the Gittite. The king said to the troops, “I too will indeed march out with you.”

2 Samuel 18:12

18:12 The man replied to Joab, “Even if I were receiving a thousand pieces of silver, I would not strike the king’s son! In our very presence the king gave this order to you and Abishai and Ittai, ‘Protect the young man Absalom for my sake.’