1 Kings 2:8-9
8 Behold, (A)there is with you Shimei the son of Gera the Benjamite, of Bahurim; now it was he who cursed me with a (a)violent curse on the day I went to Mahanaim. But when (B)he came down to me at the Jordan, I swore to him by the Lord, saying, ‘I will not put you to death with the sword.’
9 Now therefore, do not let him go unpunished, (C)for you are a wise man; and you will know what you ought to do to him, and you will bring his gray hair down to (b)Sheol with blood.”