2 Kings 17:27-28

Then the king of Assyria commanded, “Take back [to Samaria] one of the priests whom you brought from there, and have him go and live there; and have him teach the people the custom of the god of the land.” So one of the priests whom they had exiled from Samaria came [back] and lived in Bethel and taught them how they should fear [and worship] the LORD.