1 Kings 2:5-6

“Also, you remember what Joab son of Zeruiah did to me. He killed the two commanders of Israel’s armies: Abner son of Ner and Amasa son of Jether. He did this as if he and they were at war, although it was a time of peace. He put their blood on the belt around his waist and on his sandals on his feet. Punish him in the way you think is wisest, but do not let him die peacefully of old age.