Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him): "Whoever goes to a soothsayer and believes what he says, whoever has intercourse with a woman in her backside, and whoever has intercourse with a menstruating woman, has disowned that (religion) which was revealed to Muhammad (peace and blessings be upon him)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14124