1 Kings 1:5

Then Adonijah, the son of Haggith, exalted himself, saying, I will be king. Amnon having been murdered, Chileab, or Daniel, having apparently died in childhood, and Absalom having perished in the insurrection begun by him, Adonijah believed himself to be the rightful claimant to the throne. And he prepared him chariots and horsemen, and fifty men to run before him, to be his body-guard, all in an overexaltation which did not become him. Cf 2 Samuel 16:1.