Musnad Abu Ya'la al-Mawsili 160:67

Abu Hammam al-Walid ibn Shuja' narrated to us, Yahya ibn Zakariya ibn Abi Za'idah narrated to us, from Muslim, from al-'Ala' ibn 'Abd al-Rahman, from his father, from Abu Hurayrah, that the Messenger of Allah (may Allah bless him and grant him peace) said: "Cursed is he who approaches women in their anuses."