1 Kings 2:33-37

So their blood shall return on the head of Joab and on the head of his descendants forever; but for David and his descendants, and his house and his throne, may there be peace from the Lord forever.”

Then Benaiah the son of Jehoiada went up and struck him and put him to death, and he was buried at his own house in the wilderness.

And the king appointed Benaiah the son of Jehoiada over the army in his place, and the king appointed Zadok the priest in place of Abiathar. Shimei Executed

Now the king sent men and summoned Shimei, and said to him, “Build yourself a house in Jerusalem and live there, and do not leave there for any other place.

For on the day you leave and cross the brook Kidron, you will know for certain that you will assuredly die; your blood will be on your own head.”