1 Kings 2:8-9

8“And remember Shimei son of Gera, the man from Bahurim in Benjamin. He cursed me with a terrible curse as I was fleeing to Mahanaim. When he came down to meet me at the Jordan River, I swore by the Lord that I would not kill him.

9But that oath does not make him innocent. You are a wise man, and you will know how to arrange a bloody death for him.”