וּנְתָנָ֛ם יְהוָ֥ה אֱלֹהֶ֖יךָ לְפָנֶ֑יךָ וְהָמָם֙ מְהוּמָ֣ה גְדֹלָ֔ה עַ֖ד הִשָּׁמְדָֽם׃
But the LORD thy God shall deliver them up before thee, and shall discomfit them with a great discomfiture, until they be destroyed.
Read halakhic rulings (Jewish law) on Deuteronomy 7:23: and classical halakhic sources.