Charles Ellicott Commentary 2 Kings 15:12

"This was the word of Jehovah which he spake unto Jehu, saying, Thy sons to the fourth generation shall sit upon the throne of Israel. And so it came to pass." — 2 Kings 15:12 (ASV)

This was the word of the Lord. —Thenius considers this remark as added by the Judæan editor to the short abstract of Zachariah’s reign.