Joab said, "I'm not going to wait like this for you." So he took three javelins in his hand and plunged them into Absalom's heart while Absalom was still alive in the oak tree. (NIV)
Joab said, I will not tarry thus with you. He took three darts in his hand and thrust them into the body of Absalom while he was yet alive in the midst of the oak. (AMP)
Then said Joab, I may not tarry thus with thee. And he took three darts in his hand, and thrust them through the heart of Absalom, while he was yet alive in the midst of the oak. (KJV)