3You shall not do as they do in the land of Egypt, where you lived. You shall not do as they do in the land of Canaan, where I am bringing you. You shall not follow their statutes.
4You shall do my ordinances. You shall keep my statutes and walk in them. I am the LORD your God.
5You shall therefore keep my statutes and my ordinances, which if a man does, he shall live in them. I am the LORD.
6“‘None of you shall approach any close relatives, to uncover their nakedness: I am the LORD.
7“‘You shall not uncover the nakedness of your father, nor the nakedness of your mother: she is your mother. You shall not uncover her nakedness.
8“‘You shall not uncover the nakedness of your father’s wife. It is your father’s nakedness.
9“‘You shall not uncover the nakedness of your sister, the daughter of your father, or the daughter of your mother, whether born at home or born abroad.
10“‘You shall not uncover the nakedness of your son’s daughter, or of your daughter’s daughter, even their nakedness; for theirs is your own nakedness.
Leviticus 18
Leviticus 18:3-10