Sunan an-Nasa'i 3296
سنن النسائي#3296Sahihأَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا الْمُعْتَمِرُ، عَنْ دَاوُدَ بْنِ أَبِي هِنْدٍ، عَنِ الشَّعْبِيِّ، عَنْ أَبِي هُرَيْرَةَ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم أَنْ تُنْكَحَ الْمَرْأَةُ عَلَى عَمَّتِهَا وَالْعَمَّةُ عَلَى بِنْتِ أَخِيهَا .
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
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 26:101