Deuteronomy 27:20

20 ‘Cursed is anyone who has sexual intercourse with one of his father’s wives, for he has violated his father.’ And all the people will reply, ‘Amen.’

Deuteronomy 27:20 Meaning and Commentary

Deuteronomy 27:20

Cursed [be] he that lieth with his father's wife
As Reuben did, and which is forbidden ( Leviticus 18:8 ) ; because he uncovereth his father's skirt;
see ( Deuteronomy 22:30 ) ; and all the people shall say Amen;
the tribe of Reuben said this as well as the rest.

Deuteronomy 27:20 In-Context

18 ‘Cursed is anyone who leads a blind person astray on the road.’ And all the people will reply, ‘Amen.’

19 ‘Cursed is anyone who denies justice to foreigners, orphans, or widows.’ And all the people will reply, ‘Amen.’

20 ‘Cursed is anyone who has sexual intercourse with one of his father’s wives, for he has violated his father.’ And all the people will reply, ‘Amen.’

21 ‘Cursed is anyone who has sexual intercourse with an animal.’ And all the people will reply, ‘Amen.’

22 ‘Cursed is anyone who has sexual intercourse with his sister, whether she is the daughter of his father or his mother.’ And all the people will reply, ‘Amen.’