Imamat 18:13

18:13 You must not have sexual intercourse with your mother’s sister, because she is your mother’s flesh.

Imamat 20:19

20:19 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 

[20:19]  ¹ tn Heb “his flesh.”

[20:19]  ² tn See the note on Lev 17:16 above.