Abdullahb. Aba Umayya. if Allah grants you victory in Ta'if on the next day, I will show you the daughter of Ghailan for she has four folds (upon her body) on the front side of her stomach and eight folds on the back. Messenger of Allah ﷺ heard this and he said: Such (people) should not visit you.  

أَنَّ مُخَنَّثًا كَانَ عِنْدَهَا وَرَسُولُ اللَّهِ ﷺ فِي الْبَيْتِ فَقَالَ لأَخِي أُمِّ سَلَمَةَ يَا عَبْدَ اللَّهِ بْنَ أَبِي أُمَيَّةَ إِنْ فَتَحَ اللَّهُ عَلَيْكُمُ الطَّائِفَ غَدًا فَإِنِّي أَدُلُّكَ عَلَى بِنْتِ غَيْلاَنَ فَإِنَّهَا تُقْبِلُ بِأَرْبَعٍ وَتُدْبِرُ بِثَمَانٍ قَالَ فَسَمِعَهُ رَسُولُ اللَّهِ ﷺ فَقَالَ لاَ يَدْخُلْ هَؤُلاَءِ عَلَيْكُمْ  

As the comes in front tour folds appear on her front side and as she turns her back eight folds appear on the back side. Thereupon Allah's Apostle ﷺ said: I me that he knows these things; do not, therefore. allow him to cater. She (" A'isha) said: Then they began to observe veil from him.  

كَانَ يَدْخُلُ عَلَى أَزْوَاجِ النَّبِيِّ ﷺ مُخَنَّثٌ فَكَانُوا يَعُدُّونَهُ مِنْ غَيْرِ أُولِي الإِرْبَةِ قَالَ فَدَخَلَ النَّبِيُّ ﷺ يَوْمًا وَهُوَ عِنْدَ بَعْضِ نِسَائِهِ وَهُوَ يَنْعَتُ امْرَأَةً قَالَ إِذَا أَقْبَلَتْ أَقْبَلَتْ بِأَرْبَعٍ وَإِذَا أَدْبَرَتْ أَدْبَرَتْ بِثَمَانٍ فَقَالَ النَّبِيُّ ﷺ أَلاَ أَرَى هَذَا يَعْرِفُ مَا هَا هُنَا لاَ يَدْخُلَنَّ عَلَيْكُنَّ قَالَتْ فَحَجَبُوهُ