New Revised Standard Version
If a man takes a wife and her mother also, it is depravity; they shall be burned to death, both he and they, that there may be no depravity among you.

Contemporary English Version
It isn't natural for a man to marry both a woman and her daughter, and so all three of them will be burned to death.

New American Bible
If a man marries a woman and her mother also, that is shameful conduct; the man and the two women as well shall be burned to death, so that shamefulness may not be found among you.

Douay-Rheims Bible
If any man after marrying the daughter, marry her mother, he hath done a heinous crime. He shall be burnt alive with them: neither shall so great an abomination remain in the midst of you.

If any man after marrying the daughter, marry her mother, he hath done a heinous crime. He shall be burnt alive with them: neither shall so great an abomination remain in the midst of you.

a wife

Leviticus 18:17 Thou shalt not uncover the nakedness of thy wife and her daughter. Thou shalt not take her son's daughter or her daughter's daughter, to discover her shame: because they are her flesh, and such copulation is incest.

Deuteronomy 27:23 Cursed be he that lieth with his mother-in-law: and all the people shall say: Amen.

Amos 2:7 They bruise the heads of the poor upon the dust of the earth, and turn aside the way of the humble: and the son and his father have gone to the same young woman, to profane my holy name.

burnt

Leviticus 21:9 If the daughter of a priest be taken in whoredom and dishonour the name of her father, she shall be burnt with fire.

Joshua 7:15,25 And whosoever he be that shall be found guilty of this fact, he shall be burnt with fire, with all his substance, because he hath transgressed the covenant of the Lord, and hath done wickedness in Israel. . . .