Calves of Jeroboam: Worship of Became the Sin of Israel
Source: TTT
1 Kings 12:30
And this thing became a sin; the people walked as far as Dan to worship before one of the calves.
2 Kings 10:31
Yet Jehu was not careful to follow the instruction of the LORD, the God of Israel, with all his heart. He did not turn away from the sins that Jeroboam had caused Israel to commit.
2 Chronicles 13:8
And now you think you can resist the kingdom of the LORD, which is in the hands of David’s descendants. You are indeed a vast army, and you have with you the golden calves that Jeroboam made for you as gods.