1 Samuel 8:10-12

10So Samuel told all the words of the Lord to the people who were asking for a king from him.

11He said, "These will be the ways of the king who will reign over you: he will take your sons and appoint them to his chariots and to be his horsemen and to run before his chariots.

12And he will appoint for himself commanders of thousands and commanders of fifties, and some to plow his ground and to reap his harvest, and to make his implements of war and the equipment of his chariots.