'Punishing' in the Bible

then hear from heaven and act and judge Your servants, punishing the wicked by bringing his way on his own head and justifying the righteous by giving him according to his righteousness.

And that's exactly what happened. While Jehu was punishing Ahab's dynasty, he located the princes of Judah and the sons of Ahaziah's brothers who were ministering to Ahaziah, and he put them to death.