1 KINGS 2:20-23

²⁰Then she said, I ask one small petition of thee; deny me not. And the king said unto her, Ask on, my mother: for I will not deny thee.

²¹And she said, Let Abishag the Shunammite be given to Adonijah thy brother to wife.

²²And king Solomon answered and said unto his mother, And why dost thou ask Abishag the Shunammite for Adonijah? ask for him the kingdom also; for he is mine elder brother; even for him, and for Abiathar the priest, and for Joab the son of Zeruiah.

²³Then king Solomon sware by the LORD, saying, God do so to me, and more also, if Adonijah have not spoken this word against his own life.