The Lord said to Jehu, “You have done well. You have accomplished my will and carried out my wishes with regard to Ahab’s dynasty. Therefore four generations of your descendants will rule over Israel.”
The rest of the events of Jeroboam’s reign, including all his accomplishments, his military success in restoring Israelite control over Damascus and Hamath, are recorded in the scroll called the Annals of the Kings of Israel.
His assassination brought to fulfillment the Lord’s word to Jehu, “Four generations of your descendants will rule over Israel.” That is exactly what happened.