John Gills Exposition of the Bible Commentary - Leviticus 20:18
And if a man shall lie with a woman having her sickness ,.... Her monthly courses, which make her weak and languid, which is forbidden, Leviticus 18:19 ; this is not to be understood of a man's lying with his wife ignorantly, when in such a condition, for this being the case, he was only unclean seven days, Leviticus 15:24 ; whereas this made him and her liable to cutting off, as in an after clause; but of his lying with her, knowing this to be the case with her, and of which she could... read more
John Gills Exposition of the Bible Commentary - Leviticus 20:17
And if a man shall take his sister, his father's daughter, or his mother's daughter ,.... Take her to be his wife, or commit lewdness with her, whether she be his sister by both father and mother's side, or whether by one only, either way she is his sister, and it is not lawful to marry her, or lie with her, see Leviticus 18:9 , and see her nakedness, and she see his nakedness ; which is not to be understood of an immodest view, exposing to each other what should not be seen, and... read more