Leviticus 18:15-18

¹⁵The nakedness of thy daughter-in-law thou shalt not uncover; she is thy son’s wife, thou shalt not uncover her nakedness.

¹⁶The nakedness of thy brother’s wife thou shalt not uncover; it is thy brother’s nakedness.

¹⁷The nakedness of a woman and of her daughter thou shalt not uncover; thou shalt not take the daughter of her son nor the daughter of her daughter to uncover her nakedness; they are near of kin, it is a device of wickedness.

¹⁸And a wife with her sister thou shalt not take to cause her tribulation by uncovering her nakedness over her in her life (time).