Narrated Ibn 'Abbas: The Prophet cursed effeminate men (those men who are in the similitude (assume the manners of women) and those women who assume the manners of men, and he said, "Turn them out of your houses ." The Prophet turned out suchand-such man, and 'Umar turned out such-and-such woman.
— Sahih Bukhari, Volume 7, Book 72: Dress, Hadith #774