John Gill Commentary 1 Kings 16:12

"Thus did Zimri destroy all the house of Baasha, according to the word of Jehovah, which he spake against Baasha by Jehu the prophet," — 1 Kings 16:12 (ASV)

Thus did Zimri destroy all the house of Baasha, according to the word of the Lord, which he spoke against Baasha by Jehu the prophet. That not only his posterity, but all any way related to him, should be cut off; yes, it seems to have been carried further, even to all that were in any connection with him in point of friendship, see (1 Kings 16:3).