Albert Barnes Commentary 1 Kings 16:1

"And the word of Jehovah came to Jehu the son of Hanani against Baasha, saying," — 1 Kings 16:1 (ASV)

Hanani, the father of Jehu, was a seer for Asa, king of Judah (2 Chronicles 16:7–10). His son Jehu, who serves in the same office here in the kingdom of Israel, later appears as an inhabitant of Jerusalem, where he prophesied under Jehoshaphat, whom he rebuked on one occasion. He must have lived to a great age, for he outlived Jehoshaphat and wrote the account of his life (as noted in the marginal references).