وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ سُمَىٍّ، مَوْلَى أَبِي بَكْرٍ عَنْ أَبِي بَكْرِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ عَائِشَةَ، وَأُمِّ سَلَمَةَ زَوْجَىِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُمَا قَالَتَا إِنْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم لَيُصْبِحُ جُنُبًا مِنْ جِمَاعٍ غَيْرِ احْتِلاَمٍ ثُمَّ يَصُومُ ‏.‏

Yahya related to me from Malik from Sumayy, the mawla of AbuBakr, from Abu Bakr ibn Abd ar-Rahman that A'isha and Umm Salama, thewives of the Prophet, may Allah bless him and grant him peace, said,"The Messengerof Allah, may Allah bless him and grant him peace, usedto get up in the morning junub from intercourse, not a dream, andwould then fast." Translation Not Available

Book Ref: Muwatta Imam Malik Book 18 Hadith 645
Web Ref:  Muwatta Imam Malik Book 18 Hadith 12