Deuteronomy 32:37

37.And he shall say, Where are their gods? Commentators are here at issue, for some continue the paragraph, as if Moses were reporting the boastings and insults of their enemies in the afflicted state of the Church; whilst others consider it to be a pious exultation, wherein the faithful will celebrate the deliverance of the Church. If we suppose the enemies to be here speaking, it will be inconsistent that the word “gods” should be used in the plural number: besides, what follows will proceed from their mistake and ignorance, that the Israelites “did eat the fat,” which was not lawful for them even in their common food, and much less in the sacrifices wherein the fat was burnt. The other exposition, however, is that which I rather approve of, viz., that when the tables were turned, and God should have shown Himself as the avenger of the unbelievers cruel injustice, — God’s children would be at liberty to upbraid them. The word “he shall say,” (292) is used indefinitely for “It shall be said by any or all of God’s children.” Just, then, as unbelievers, when they see the saints afflicted, impudently ridicule their faith, so on the other side Moses, when God comes to the help of His Church, introduces the saints derisively inquiring, where are the gods of the Gentiles, and where are all their patrons? since all of them, as is well known, had their tutelary gods. Thus their impure and spurious sacrifices are satirized in which they ate the fat, and drank the libations of wine. In short, Moses intimates that, when God succors His people, their mouth is opened to sing the song of triumph to the glory of the true God, and to upbraid unbelievers with the false confidence whereby they are deceived.