1 Kings 1:20

Tell them who shall sit on the throne - Side by side with what may be called the natural right of hereditary succession, there existed in the old world, and especially in the East, a right, if not of absolutely designating a successor, yet at any rate of choosing one among several sons. Thus, Cyrus designated Cambyses; and Darius designated Xerxes; and a still more absolute right of nomination was exercised by some of the Roman emperors.