1 Kings 2:8-10

And there is also with you Shimei the son of Gera, the Benjaminite from Bahurim, who cursed me with a grievous curse on the day when I went to Mahanaim. But when he came down to meet me at the Jordan, I swore to him by the LORD, saying, ‘I will not put you to death with the sword.’ Now therefore do not hold him guiltless, for you are a wise man. You will know what you ought to do to him, and you shall bring his gray head down with blood to Sheol.” Then David slept with his fathers and was buried in the city of David.