Deuteronomy 27:20

20 "'Cursed be he who lies with his father's wife, because he has uncovered her who is his father's.' And all the people shall say, '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 be he who misleads a blind man on the road.' And all the people shall say, 'Amen.'

19 "'Cursed be he who perverts the justice due to the sojourner, the fatherless, and the widow.' And all the people shall say, 'Amen.'

20 "'Cursed be he who lies with his father's wife, because he has uncovered her who is his father's.' And all the people shall say, 'Amen.'

21 "'Cursed be he who lies with any kind of beast.' And all the people shall say, 'Amen.'

22 "'Cursed be he who lies with his sister, whether the daughter of his father or the daughter of his mother.' And all the people shall say, 'Amen.'