1 Kings 1:5-7

5At that time Adonijah, David’s son by Haggith, began to exalt himself, saying, “I will be king!” And he acquired chariots and horsemen and fifty men to run ahead of him.

6(His father had never once reprimanded him by saying, “Why do you act this way?” Adonijah was also very handsome, born next after Absalom.)

7So Adonijah conferred with Joab son of Zeruiah and with Abiathar the priest, who supported him.