You must not have sexual intercourse with your mother’s sister, because she is your mother’s flesh.

You must not expose the nakedness of your mother’s sister and your father’s sister, for such a person has laid bare his own close relative. ¹  They must bear their punishment for iniquity. ² 

The Israelite woman’s son misused the Name and cursed, ¹  so they brought him to Moses. (Now his mother’s name was Shelomith daughter of Dibri, of the tribe of Dan.)

You must not have sexual intercourse with your sister, whether she is your father’s daughter or your mother’s daughter, ¹  whether she is born in the same household or born outside it; ²  you must not have sexual intercourse with either of them. ³