Deuteronomy 9:3Meaning & Commentary from the Church Fathers

Thou shalt know therefore this day that the Lord thy God himself will pass over before thee, a devouring and consuming fire, to destroy and extirpate and bring them to nothing before thy face quickly, as he hath spoken to thee.

וְיָדַעְתָּ֣ הַיּ֗וֹם כִּי֩ יְהוָ֨ה אֱלֹהֶ֜יךָ הֽוּא־הָעֹבֵ֤ר לְפָנֶ֙יךָ֙ אֵ֣שׁ אֹֽכְלָ֔ה ה֧וּא יַשְׁמִידֵ֛ם וְה֥וּא יַכְנִיעֵ֖ם לְפָנֶ֑יךָ וְהֽוֹרַשְׁתָּ֤ם וְהַֽאַבַדְתָּם֙ מַהֵ֔ר כַּאֲשֶׁ֛ר דִּבֶּ֥ר יְהוָ֖ה לָֽךְ׃