‏النكاح : Hadeeth No:3272 Abu Huraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: One should not combine in marriage a woman with her father's sister, or her mother's sister....

‏الإمارة : Hadeeth No:4664 A similar tradition has been narrated on the authority of al-A'mash....