What does 2 Kings 19:37 mean?

While he was worshiping in the temple of his god Nisrok, his sons Adrammelech and Sharezer killed him with a sword. They escaped to the land of Ararat, and his son Esarhaddon became king after him. 2 Kings 19:37 - Modern Text Bible

(Sennacherib is assassinated by his own sons while worshiping his god, showing that his power and his gods couldn’t save him.)