Rashi on Leviticus 18:14/רש"י על ויקרא י״ח:י״ד

1ערות אחי אביך לא תגלה THE NAKEDNESS OF THY FATHER'S BROTHER THOU SHALT NOT UNCOVER — and what does this "uncovering of his nakedness" mean אל אשתו לא תקרב? THOU SHALT NOT APPROACH TO HIS WIFE.