1 Kings 2:6-9

6So act according to your wisdom, and let his gray hair not go down to Sheol in shalom.

7But show kindness to the sons of Barzillai the Gileadite, and let them be among those who eat at your table—for they befriended me when I fled from your brother Absalom.

8Also behold, you have with you Shimei son of Gera, the Benjamite from Bahurim, who cursed me with a grievous curse on the day I went to Mahanaim. But when he came down to meet me at the Jordan, I swore to him by Adonai saying: ‘I will not put you to death with the sword.’

9Now don’t let him go unpunished. For you are a wise man, and you will know how to deal with him, and bring his gray hair down to Sheol with blood.”