Leviticus 18:7

18:7 You must not ¹  expose your father’s nakedness by having sexual intercourse with your mother. ²  She is your mother; you must not have intercourse with her.

Leviticus 18:10

18:10 You must not expose the nakedness of your son’s daughter or your daughter’s daughter by having sexual intercourse with them, because they are your own nakedness. ³ 

¹ tn The verbal negative here is the same as that used in the Ten Commandments (Exod 20:4-5, 7, 13-17). It suggests permanent prohibition rather than a simple negative command and could, therefore, be rendered “must not” here and throughout the following section as it is in vv. 3-4 above.

² tn Heb “The nakedness of your father and [i.e., even] the nakedness of your mother you shall not uncover.”

³ sn That is, to have sexual intercourse with one’s granddaughter would be like openly exposing one’s own shameful nakedness (see the note on v. 7 above).