Levลนต Leviticusเลวีนิติ, chapterบทที่ Book of Leviticusเลวีนิติ, chapterบทที่ 20

And if an ish shall take his achot, the bat of his av (father), or the bat of his em (mother), and see her nakedness, and she see his nakedness; it is a disgrace; and they shall be cut off in the sight of their Bnei Am; he hath uncovered the nakedness of his achot (sister); he shall bear his iniquity.