2 Samuel 18:14

14 Then said Yo'av, I may not wait thus with you. He took three darts in his hand, and thrust them through the heart of Avshalom, while he was yet alive in the midst of the oak.

2 Samuel 18:14 In-Context

12 The man said to Yo'av, Though I should receive a thousand [pieces of] silver in my hand, I still wouldn't put forth my hand against the king's son; for in our hearing the king charged you and Avishai and Ittai, saying, Beware that none touch the young man Avshalom.
13 Otherwise if I had dealt falsely against his life (and there is no matter hid from the king), then you yourself would have set yourself against [me].
14 Then said Yo'av, I may not wait thus with you. He took three darts in his hand, and thrust them through the heart of Avshalom, while he was yet alive in the midst of the oak.
15 Ten young men who bore Yo'av's armor compassed about and struck Avshalom, and killed him.
16 Yo'av blew the shofar, and the people returned from pursuing after Yisra'el; for Yo'av held back the people.
The Hebrew Names Version is in the public domain.