1 Samuel 10:25

“So now, listen to their voice; however, you shall solemnly testify to them and tell them of the custom of the king who will reign over them.”

And he said, “This will be the custom of the king who will reign over you: he will take your sons and appoint them for himself in his chariots and among his horsemen, and they will run before his chariots.

Then Samuel said to the people, “Come and let us go to Gilgal and renew the kingdom there.”

Then Jehoiada cut a covenant between Yahweh and the king and the people, that they would be the people of Yahweh, also between the king and the people.