The Book of Marriage (Kitab Al-Nikah)
Muslim :: Book 8 : Hadith 3271
Abu Huraira (Allah be pleased with him) reported that Allah's Messenger (may peace be upon him) forbade a person to combine in marriage a womanarid her father's sister, and a woman and her mother's sister. Ibn Shihab said: So we regarded the paternal aunt of her (wife's) father and the maternal aunt of her (wife's) father at the same level.