"The Messenger of Allah forbade taking a woman as a co-wife to her paternal aunt or her maternal aunt." (Using translation from Nasāʾī 3296)
نَهَى رَسُولُ اللهِ ﷺ أَنْ «تُنْكَحَ الْمَرْأَةُ عَلَى عَمَّتِهَا وَالْعَمَّةُ عَلَى ابْنَةِ أَخِيهَا» وَقَّفَهُ ابْنُ عَوْنٍ