Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "A woman is not to be married on top of her paternal aunt or on top of her maternal aunt; nor is a paternal aunt to be married on top of her brother's daughter, nor a maternal aunt on top of her sister's daughter; nor the younger on top of the elder, nor the elder on top of the younger."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13948