Parallel
Leviticus 18:17
Brenton's English Septuagint · Berean Standard Bible
The nakedness of a woman and her daughter shalt thou not uncover; her son's daughter, and her daughter's daughter, shalt thou not take, to uncover their nakedness, for they are thy kinswomen: it is impiety.
You must not have sexual relations with both a woman and her daughter. You are not to marry her son’s daughter or her daughter’s daughter and have sexual relations with her. They are close relatives; it is depraved.