Deuteronomy 27:23

23 "A man will be cursed who has sexual relations with his mother-in-law." Then all the people will say, "Amen!"

Deuteronomy 27:23 Meaning and Commentary

Deuteronomy 27:23

Cursed [be] he that lieth with his mother in law
See ( Leviticus 18:7 Leviticus 18:8 ) . All these incestuous or brutal copulations may well be supposed to be done in secret: and all the people shall say Amen;
as abhorring such incest.

Deuteronomy 27:23 In-Context

21 "Anyone will be cursed who has sexual relations with an animal." Then all the people will say, "Amen!"

22 "A man will be cursed who has sexual relations with his sister, whether she is his father's daughter or his mother's daughter." Then all the people will say, "Amen!"

23 "A man will be cursed who has sexual relations with his mother-in-law." Then all the people will say, "Amen!"

24 "Anyone will be cursed who kills a neighbor secretly." Then all the people will say, "Amen!"

25 "Anyone will be cursed who takes money to murder an innocent person." Then all the people will say, "Amen!"