כִּ֣י יָדַ֗עְתִּי אַחֲרֵ֤י מוֹתִי֙ כִּֽי־הַשְׁחֵ֣ת תַּשְׁחִת֔וּן וְסַרְתֶּ֣ם מִן־הַדֶּ֔רֶךְ אֲשֶׁ֥ר צִוִּ֖יתִי אֶתְכֶ֑ם וְקָרָ֨את אֶתְכֶ֤ם הָֽרָעָה֙ בְּאַחֲרִ֣ית הַיָּמִ֔ים כִּֽי־תַעֲשׂ֤וּ אֶת־הָרַע֙ בְּעֵינֵ֣י יְהוָ֔ה לְהַכְעִיס֖וֹ בְּמַעֲשֵׂ֥ה יְדֵיכֶֽם׃
For I know that after my death ye will in any wise deal corruptly, and turn aside from the way which I have commanded you; and evil will befall you in the end of days; because ye will do that which is evil in the sight of the LORD, to provoke Him through the work of your hands.’
Read halakhic rulings (Jewish law) on Deuteronomy 31:29: and classical halakhic sources.