When Jehu was executing judgment on Ahab’s family, he found Judah’s leaders (Ahaziah’s nephews) who were serving Ahaziah, and he killed them.
The Aramean army had come with a small number of men, but the Lord handed Joash’s large army over to them because Joash’s soldiers had abandoned the Lord God of their ancestors. So the Arameans carried out ⌞the Lord’s⌟ judgment on Joash.