Musnad Ahmad 30:2167

'Affan narrated to us, he said: Hammad ibn Salamah narrated to us, he said: Hakim al-Athram informed us, from Abu Tamimah al-Hujaymi, from Abu Hurayrah, that the Messenger of Allah, peace and blessings of Allah be upon him, said: "Whoever has intercourse with a menstruating woman, or a woman in her anus, or a soothsayer and believes him, then he has disassociated from what was revealed to Muhammad."