1 Kings 2:20-22

20She said, ‘I have one small thing to ask you. Please do not refuse to do it for me.’ The king said to her, ‘Ask me, mother! I will not refuse you!’

21So she said, ‘Please let your brother Adonijah marry Abishag, the girl from Shunem.’

22But King Solomon said to his mother, ‘You are asking me to give Abishag to Adonijah as his wife! You should also ask me to give my kingdom to him, my older brother! That would be the same thing. Then he would rule together with Abiathar the priest and Zeruiah's son Joab!’