Muwatta Malik 640
Fasting
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ رَبِّهِ بْنِ سَعِيدٍ، عَنْ أَبِي بَكْرِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ بْنِ هِشَامٍ، عَنْ عَائِشَةَ، وَأُمِّ سَلَمَةَ زَوْجَىِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُمَا قَالَتَا كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصْبِحُ جُنُبًا مِنْ جِمَاعٍ غَيْرِ احْتِلاَمٍ فِي رَمَضَانَ ثُمَّ يَصُومُ .
Yahya related to me from Malik from Abd Rabbih ibn Said from Abu Bakr ibn Abd ar-Rahman ibn al-Harith ibn Hisham from A'isha and Umm Salama, the wives of the Prophet, may Allah bless him and grant him peace, that the Prophet, may Allah bless him and grant him peace, used to get up in the morning junub from intercourse, not a dream, in Ramadan, and then he would fast
Grading: Salim al-Hilali: Sahih
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.