2 Samuel 18:10-14 (New Revised Standard)
10
A man saw it, and told Joab, "I saw Absalom hanging in an oak."
11
Joab said to the man who told him, "What, you saw him! Why then did you not strike him there to the ground? I would have been glad to give you ten pieces of silver and a belt."
12
But the man said to Joab, "Even if I felt in my hand the weight of a thousand pieces of silver, I would not raise my hand against the king's son; for in our hearing the king commanded you and Abishai and Ittai, saying: For my sake protect the young man Absalom!
13
On the other hand, if I had dealt treacherously against his life a (and there is nothing hidden from the king), then you yourself would have stood aloof."
14
Joab said, "I will not waste time like this with you." He took three spears in his hand, and thrust them into the heart of Absalom, while he was still alive in the oak.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (New Revised Standard)
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a.
2 Samuel 18:13 - Another reading is [at the risk of my life]