2 Samuel 18:11-12

18:11 Joab replied to the man who was telling him this, “What! You saw this? Why didn’t you strike him down right on the spot? I would have given you ten pieces of silver and a commemorative belt!”

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.’