Shmuel Alef 8:5-6

And said unto him, Hinei, thou art old, and thy banim walk not in thy drakhim; now appoint for us a Melech to judge us like kol HaGoyim. But the thing was displeasing in the eyes of Shmuel, when they said, Give us a Melech to judge us. And Shmuel davened unto HASHEM.