Deuteronomy 27:23 Halakhah

אָר֕וּר שֹׁכֵ֖ב עִם־חֹֽתַנְתּ֑וֹ וְאָמַ֥ר כָּל־הָעָ֖ם אָמֵֽן׃ (ס)

Cursed be he that lieth with his mother-in-law. And all the people shall say: Amen.

Read halakhic rulings (Jewish law) on Deuteronomy 27:23: and classical halakhic sources.