The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncover: she is thy mother; thou shalt not uncover her nakedness.
Part of Israel's holiness code regarding prohibited sexual relationships within family structures.
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
5Ye shall therefore keep my statutes, and my judgments: which if a man do, he shall live in them: I am the LORD.
6None of you shall approach to any that is near of kin to him, to uncover their nakedness: I am the LORD.
7The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncover: she is thy mother; thou shalt not uncover her nakedness.
8The nakedness of thy father’s wife shalt thou not uncover: it is thy father’s nakedness.
9The nakedness of thy sister, the daughter of thy father, or daughter of thy mother, whether she be born at home, or born abroad, even their nakedness thou shalt not uncover.