I Samuel 8:1-6

Now it came to pass when Samuel was old that he made his sons judges over Israel. The name of his firstborn was Joel, and the name of his second, Abijah; they were judges in Beersheba. But his sons did not walk in his ways; they turned aside after dishonest gain, took bribes, and perverted justice. Then all the elders of Israel gathered together and came to Samuel at Ramah, and said to him, “Look, you are old, and your sons do not walk in your ways. Now make us a king to judge us like all the nations.” But the thing displeased Samuel when they said, “Give us a king to judge us.” So Samuel prayed to the LORD.