حَدَّثَنِي مَالِكٌ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّ مُخَنَّثًا، كَانَ عِنْدَ أُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم ‏.‏ فَقَالَ لِعَبْدِ اللَّهِ بْنِ أَبِي أُمَيَّةَ وَرَسُولُ اللَّهِ صلى الله عليه وسلم يَسْمَعُ يَا عَبْدَ اللَّهِ إِنْ فَتَحَ اللَّهُ عَلَيْكُمُ الطَّائِفَ غَدًا فَأَنَا أَدُلُّكَ عَلَى ابْنَةِ غَيْلاَنَ فَإِنَّهَا تُقْبِلُ بِأَرْبَعٍ وَتُدْبِرُ بِثَمَانٍ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لاَ يَدْخُلَنَّ هَؤُلاَءِ عَلَيْكُمْ ‏"‏ ‏.‏

Malik said from Hisham ibn Urwa from his father that aneffeminate man was with Umm Salama, the wife of the Prophet, may Allahbless him and grant him peace. He said to Abdullah ibn Abi Umayyawhile the Messenger of Allah, may Allah bless him and grant him peace,was listening. "Abdullah! If Allah grants you victory over Ta'iftomorrow, I will lead you to the daughter of Ghailan. She has fourfolds on her front and eight folds on her back." The Messenger ofAllah, may Allah bless him and grant him peace, said, "This sort ofman should not enter freely with you." (It was customary to allow menwith no sexual inclination to enter freely where there were women). Translation Not Available

Book reference: Muwatta Imam Malik Book 37 Hadith 1462
Web reference: Muwatta Imam Malik Book 37 Hadith 5