Leviticus 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.

Le 20:11; Eze 22:10

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.”

sn Commentators suggest that the point of referring to the father’s nakedness is that the mother’s sexuality belongs to the father and is forbidden to the son on that account (see B. A. Levine, Leviticus [JPSTC], 120, and J. E. Hartley, Leviticus [WBC], 294). The expression may, however, derive from the shame of nakedness when exposed. If one exposes his mother’s nakedness to himself it is like openly exposing the father’s nakedness (cf. Gen 9:22-23 with the background of Gen 2:25 and 3:7, 21). The same essential construction is used in v. 10 where the latter explanation makes more sense than the former.