The sins of Jeroboam, i.e. the worship of the calves; which all the kings of Israel kept up as a wall of partition between their subjects and those of Judah. Thus he shows that his religion was overruled by his interest and policy.
Related Commentaries of 2 Kings 3:3
2 Kings 3:3
3 Nevertheless he cleaved unto the sins of Jeroboam the son of Nebat, which made Israel to sin; he departed not therefrom.