וְאָנֹכִ֗י הַסְתֵּ֨ר אַסְתִּ֤יר פָּנַי֙ בַּיּ֣וֹם הַה֔וּא עַ֥ל כָּל־הָרָעָ֖ה אֲשֶׁ֣ר עָשָׂ֑ה כִּ֣י פָנָ֔ה אֶל־אֱלֹהִ֖ים אֲחֵרִֽים׃
And I will surely hide My face in that day for all the evil which they shall have wrought, in that they are turned unto other gods.
Read halakhic rulings (Jewish law) on Deuteronomy 31:18: and classical halakhic sources.