1 Kings 2:21-24

Context
2:21 She said, “Allow Abishag the Shunammite to be given to your brother Adonijah as a wife.” 2:22 King Solomon answered his mother, “Why just request Abishag the Shunammite for him? ¹  Since he is my older brother, you should also request the kingdom for him, for Abiathar the priest, and for Joab son of Zeruiah!”

2:23 King Solomon then swore an oath by the Lord, “May God judge me severely, ²  if Adonijah does not pay for this request with his life! ³  2:24 Now, 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 ⁴  for me as he promised), Adonijah will be executed today!”