Psalms 78:49-51

⁴⁹Because God was fiercely angry with the people of Egypt, he caused them to be very distressed. The disasters that struck them were like a group of angels that destroyed everything.

⁵⁰He did not lessen his being angry with them, and he did not ◄spare their lives/prevent them from dying►; he sent a ◄plague/serious illness► that killed many of them.

⁵¹He also caused all the firstborn sons of the people of Egypt to die.