1 Kings 2:20-22

20Then she said, “I desire one small petition of you; do not refuse me.” And the king said to her, “Ask it, my mother, for I will not refuse you.”

21So she said, “Let Abishag the Shunammite be given to Adonijah your brother as wife.”

22And King Solomon answered and said to his mother, “Now why do you ask Abishag the Shunammite for Adonijah? Ask for him the kingdom also—for he is my older brother—for him, and for Abiathar the priest, and for Joab the son of Zeruiah.”