2 Kings 17:25, 27-28, 33

And so it was, at the beginning of their dwelling there, that they feared not Jehovah: therefore Jehovah sent lions among them, which killed some of them.

Then the king of Assyria commanded, saying, Carry thither one of the priests whom ye brought from thence; and let them go and dwell there, and let him teach them the law of the god of the land. So one of the priests whom they had carried away from Samaria came and dwelt in Beth-el, and taught them how they should fear Jehovah.

They feared Jehovah, and served their own gods, after the manner of the nations from among whom they had been carried away.