1 Kings 1:13

1:13 Visit King David and say to him, ‘My master, O king, did you not solemnly promise your servant, “Surely your son Solomon will be king after me; he will sit on my throne”? So why has Adonijah become king?’

1 Kings 1:51

1:51 Solomon was told, “Look, Adonijah fears you; see, he has taken hold of the horns of the altar, saying, ‘May King Solomon solemnly promise me today that he will not kill his servant with the sword.’”