5 Now Adonijah son of Haggith exalted himself, saying, "I will be king"; he prepared for himself chariots and horsemen, and fifty men to run before him. 6 His father had never at any time displeased him by asking, "Why have you done thus and so?" He was also a very handsome man, and he was born next after Absalom. 7 He conferred with Joab son of Zeruiah and with the priest Abiathar, and they supported Adonijah.
Matthew Henry's Commentary on 1 Kings 1:5-7
Commentary on 1 Kings 1:5-10
(Read 1 Kings 1:5-10)
Indulgent parents are often chastised with disobedient children, who are anxious to possess their estates. No worldly wisdom, nor experience, nor sacredness of character, can insure the continuance in any former course of those who remain under the power of self-love. But we may well wonder by what arts Joab and Abiathar could be drawn aside.