1 Kings 2:21-25

21She said, “Allow Abishag the Shunammite to be given to your brother Adonijah as a wife.”

22King Solomon answered his mother, “Why just request Abishag the Shunammite for him? Since he is my older brother, you should also request the kingdom for him, for Abiathar the priest, and for Joab son of Zeruiah!”

23King Solomon then swore an oath by the Lord, “May God judge me severely, if Adonijah does not pay for this request with his life!

24Now, as certainly as the Lord lives (he who made me secure, allowed me to sit on my father David’s throne, and established a dynasty for me as he promised), Adonijah will be executed today!”

25King Solomon then sent Benaiah son of Jehoiada, and he killed Adonijah.