Leviticus 18:6
"'None of you shall approach anyone who are his close relatives, to uncover their nakedness: I am Yahweh.
Leviticus 18:7-19
"'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.
Leviticus 20:11-12
"'The man who lies with his father's wife has uncovered his father's nakedness: both of them shall surely be put to death; their blood shall be upon them.
Leviticus 20:17-21
"'If a man takes his sister, his father's daughter, or his mother's daughter, and sees her nakedness, and she sees his nakedness; it is a shameful thing; and they shall be cut off in the sight of the children of their people: he has uncovered his sister's nakedness; he shall bear his iniquity.