Musnad Ahmad 30:1190

Abu Amir and Abu Salamah narrated to us, they said: Sulayman ibn Bilal narrated to us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, that the Messenger of Allah (may Allah bless him and grant him peace) cursed the man who wears the clothing of a woman, and the woman who wears the clothing of a man.