1 Samuel 8:5-6, 19-20

and they said unto him, Behold, thou art old, and thy sons walk not in thy 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. And Samuel prayed unto Jehovah.

But the people refused to hearken unto the voice of Samuel; and they said, Nay: but we will have a king over us, that we also may be like all the nations, and that our king may judge us, and go out before us, and fight our battles.