Leviticus 18:6 (KJV)

And the LORD spake unto Moses, saying,

Speak unto the children of Israel, and say unto them, I am the LORD your God.

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.

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 father's wife shalt thou not uncover: it is thy father's 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.