1 Samuel 8:5; 1 Samuel 8:19-20

5 and they said to him, "Behold, you have grown old, and your sons do not walk in your ways. Now appoint a king for us to judge us like all the nations."
19 Nevertheless, the people refused to listen to the voice of Samuel, and they said, "No, but there shall be a king over us, 20 that we also may be like all the nations, that our king may judge us and go out before us and fight our battles."