Elah son of Baasha began to rule over Israel in the twenty-sixth year of King Asa’s reign in Judah. He reigned in the city of Tirzah for two years.
9 Then Zimri, who commanded half of the royal chariots, made plans to kill him. One day in Tirzah, Elah was getting drunk at the home of Arza, the supervisor of the palace. 10 Zimri walked in and struck him down and killed him. This happened in the twenty-seventh year of King Asa’s reign in Judah. Then Zimri became the next king.
Zimri immediately killed the entire royal family of Baasha, leaving him not even a single male child. He even destroyed distant relatives and friends.
So Zimri destroyed the dynasty of Baasha as the Lord had promised through the prophet Jehu.
This happened because of all the sins Baasha and his son Elah had committed, and because of the sins they led Israel to commit. They provoked the anger of the Lord , the God of Israel, with their worthless idols.
The rest of the events in Elah’s reign and everything he did are recorded in The Book of the History of the Kings of Israel.