2 Samuel 18:2, 14-15

He sent the troops out in three groups, placing one group under Joab, one under Joab’s brother Abishai son of Zeruiah, and one under Ittai, the man from Gath. The king told his troops, “I am going out with you.”

“Enough of this nonsense,” Joab said. Then he took three daggers and plunged them into Absalom’s heart as he dangled, still alive, in the great tree. Ten of Joab’s young armor bearers then surrounded Absalom and killed him.