1 Kings 1:5-7

5About that time David’s son Adonijah, whose mother was Haggith, began boasting, “I will make myself king.” So he provided himself with chariots and charioteers and recruited fifty men to run in front of him.

6Now his father, King David, had never disciplined him at any time, even by asking, “Why are you doing that?” Adonijah had been born next after Absalom, and he was very handsome.

7Adonijah took Joab son of Zeruiah and Abiathar the priest into his confidence, and they agreed to help him become king.