Ishodad of Merv : "These two things have befallen you," that is, they have befallen you because of your sins. You have abandoned God, and you have followed the idols; that is why two punishments have come over you, "famine and sword," because "devastation" comes from the sword and "destruction" from famine. — COMMENTARY ON Isaiah 51:19 Theodoret of Cyrus : By "two," he means the bravery of the adversaries and the desertion of the auxiliaries: while the former attack with courage, the others flee in a cowardly fashion. "Downfall and destruction." He has again presented two calamities: that of falling and that of being crushed. For sometimes a person falls without being struck. "Famine and sword." Again a double chastisement: if the first make a siege from the city of the outside, even harder to endure than the enemies was the famine that was within, annihilating them. — COMMENTARY ON Isaiah 16:51.19