became a sin

1 Kings 13:34
And this was the sin of the house of Jeroboam that led to its extermination and destruction from the face of the earth.

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 Kings 17:21
When the LORD had torn Israel away from the house of David, they made Jeroboam son of Nebat king, and Jeroboam led Israel away from following the LORD and caused them to commit a great sin.