Leviticus 18:8 (KJV)

After the doings of the land of Egypt, wherein ye dwelt, shall ye not do: and after the doings of the land of Canaan, whither I bring you, shall ye not do: neither shall ye walk in their ordinances.

Ye shall do my judgments, and keep mine ordinances, to walk therein: I am the LORD your God.

Ye shall therefore keep my statutes, and my judgments: which if a man do, he shall live in them: I am the LORD.

None of you shall approach to any that is near of kin to him, to uncover their nakedness: I am the LORD.

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.

The 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.

The nakedness of thy son's daughter, or of thy daughter's daughter, even their nakedness thou shalt not uncover: for theirs is thine own nakedness.

The nakedness of thy father's wife's daughter, begotten of thy father, she is thy sister, thou shalt not uncover her nakedness.

Thou shalt not uncover the nakedness of thy father's sister: she is thy father's near kinswoman.

Thou shalt not uncover the nakedness of thy mother's sister: for she is thy mother's near kinswoman.