(47) باب الْجَمْعِ بَيْنَ الْمَرْأَةِ وَعَمَّتِهَا .
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."
Reference: Sunan an-Nasa'i 3293
In-book reference: Book 26, Hadith 98
English translation: Vol. 4, Book 26, Hadith 3295