1 Kings 2:15-25

15 And he said, You saw how the kingdom was mine, and all Israel had the idea that I would be their king; but now the kingdom is turned about, and has become my brother's, for it was given to him by the Lord.
16 Now I have one request to make to you, and do not say, No, to me. And she said to him, Say on.
17 Then he said, Will you go to Solomon the king (for he will not say, No, to you) and put before him my request that he will give me Abishag the Shunammite for a wife?
18 And Bath-sheba said, Good! I will make your request to the king.
19 So Bath-sheba went to King Solomon to have talk with him on Adonijah's account. And the king got up to come to her, and went down low to the earth before her; then he took his place on the king's seat and had a seat made ready for the king's mother and she took her place at his right hand.
20 Then she said, I have one small request to make to you; do not say, No, to me. And the king said, Say on, my mother, for I will not say, No, to you.
21 And she said, Let Abishag the Shunammite be given to Adonijah your brother for a wife.
22 Then King Solomon made answer and said to his mother, Why are you requesting me to give Abishag the Shunammite to Adonijah? Take the kingdom for him in addition, for he is my older brother, and Abiathar the priest and Joab, the son of Zeruiah, are on his side.
23 Then King Solomon took an oath by the Lord, saying, May God's punishment be on me if Adonijah does not give payment for these words with his life.
24 Now by the living Lord, who has given me my place on the seat of David my father, and made me one of a line of kings, as he gave me his word, truly Adonijah will be put to death this day.
25 And King Solomon sent Benaiah, the son of Jehoiada, and he made an attack on him and put him to death.