"The Messenger of Allah prohibited that a woman be married along with her paternal aunt, or the paternal aunt along with her brother's daughter, or a woman with her maternal aunt, or the maternal aunt along with her sister's daughter, and the younger is not to be married with the older, nor the older with the younger."
أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى أَنْ تُنْكَحَ الْمَرْأَةُ عَلَى عَمَّتِهَا أَوِ الْعَمَّةُ عَلَى ابْنَةِ أَخِيهَا أَوِ الْمَرْأَةُ عَلَى خَالَتِهَا أَوِ الْخَالَةُ عَلَى بِنْتِ أُخْتِهَا لاَ تُنْكَحُ الصُّغْرَى عَلَى الْكُبْرَى وَلاَ الْكُبْرَى عَلَى الصُّغْرَى