Deuteronomy 27:23

23 Cursed is he that lies with his daughter-in-law: and all the people shall say, So be it. Cursed is he that lies with his wife's sister: and all the people shall say, So be it.

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 Cursed is he that lies with any beast: and all the people shall say, So be it.
22 Cursed is he that lies with his sister by his father or his mother: and all the people shall say, So be it.
23 Cursed is he that lies with his daughter-in-law: and all the people shall say, So be it. Cursed is he that lies with his wife's sister: and all the people shall say, So be it.
24 Cursed is he that smites his neighbour secretly: and all the people shall say, So be it.
25 Cursed is he whosoever shall have taken a bribe to slay an innocent man: and all the people shall say, So be it.

The Brenton translation of the Septuagint is in the public domain.