Leviticus 18:6
A man, a man to any remainder of his flesh ye shall not come near to uncover nakedness: I am Jehovah.
Leviticus 18:7-19
The nakedness of thy father, and the nakedness of thy mother thou shalt not uncover: it is thy mother, thou shalt not uncover her nakedness.
Leviticus 20:11-12
And a man who shall lie with his father's wife, uncovered his father's nakedness: dying, they shall die: they two their blood is upon them,
Leviticus 20:17-21
And a man who shall take his sister, his father's daughter, or his mother's daughter, and he saw her nakedness, and she shall see his nakedness; it is a reproach; and they were cut off in the eyes of the sons of their people; he uncovered his sister's nakedness; he shall bear his iniquity.