In God's last killing, the chicken-shit leaders of Jezreel sent Jehu the heads of Ahab's sons (all 70 of them).
But that didn't quite satisfy Jehu. He had his orders from God, given to him by Elisha when Jehu was made king.
Thus saith the LORD God ... thou shalt smite the house of Ahab thy master ... The whole house of Ahab shall perish: and I will cut off from Ahab him that pisseth against the wall ....And I will make the house of Ahab like the house of Jeroboam ... and Baasha ... And the dogs shall eat Jezebel in the portion of Jezreel, and there shall be none to bury her. 2 Kings 9:6-10So although he was off to a good start, having killed Ahab's son, Jehoram, Ahab's wife, Jezebel, and 70 of Ahab's sons, there still might be a few wall-pissing family or friends of Ahab left to kill.
The first place that Jehu looked was Ahab's old hometown, Jezreel. He searched the town and found all of Ahab's family, friends, and priests -- whoever that was associated somehow with Ahab and might also have pissed against a wall at one time or another.
And then he killed them all.
So Jehu slew all that remained of the house of Ahab in Jezreel, and all his great men, and his kinsfolks, and his priests, until he left him none remaining. 2 Kings 10:11Then he took his search elsewhere.
The text doesn't say how many of Ahab's family and friends were killed in Jezreel. I'll just say 100.
God's next killing: Ahaziah's family