1 Samuel 8:10-12

10Samuel told all the Lord’s words to the people who were asking him for a king.

11He said, “These are the rights of the king who will reign over you: He will take your sons and put them to his use in his chariots, on his horses, or running in front of his chariots.

12He can appoint them for his use as commanders of thousands or commanders of fifties, to plow his ground and reap his harvest, or to make his weapons of war and the equipment for his chariots.