Sunan an-Nasa'i 3294
سنن النسائي#3294SahihIt was narrated from Abu Hurairah that the Messenger of Allah said:"A woman should not be taken as a co-wife to her paternal aunt or her maternal aunt
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 26:99