1 Kings 1:10

Solomon his brother Doubtless Adonijah was well acquainted with David's intention that Solomon should be his successor. But in those early times in most countries but especially in the East the right of hereditary succession was not thought of, the reigning monarch selecting for his successor that member of his family who was most in favour or who seemed most fit to rule. Moreover, in this case, Solomon was not the son of the first wife.

called i.e. invited to be present at the feast which he was about to make.