(26) The Book of Marriage
كتاب النكاح
(47) Chapter: Being Married To A Woman And Her Paternal Aunt At The Same Time
(47) باب الْجَمْعِ بَيْنَ الْمَرْأَةِ وَعَمَّتِهَا ‏.‏
Sunan an-Nasa'i 3293 
It was narrated that Abu Hurairah said:
"The Messenger of Allah forbade taking a woman as a co-wife to her paternal aunt or her maternal aunt."
أَخْبَرَنَا مُجَاهِدُ بْنُ مُوسَى، قَالَ حَدَّثَنَا ابْنُ عُيَيْنَةَ، عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ تُنْكَحَ الْمَرْأَةُ عَلَى عَمَّتِهَا أَوْ عَلَى خَالَتِهَا ‏.‏
Grade :  Sahih (Darussalam)
Reference : Sunan an-Nasa'i 3293
In-book reference : Book 26, Hadith 98
English translation : Vol. 4, Book 26, Hadith 3295