Hadith 502540
Chapter 6: Prayer in Ramadan - كتاب الصلاة فى رمضان
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّ ذَكْوَانَ أَبَا عَمْرٍو، - وَكَانَ عَبْدًا لِعَائِشَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم فَأَعْتَقَتْهُ عَنْ دُبُرٍ مِنْهَا - كَانَ يَقُومُ يَقْرَأُ لَهَا فِي رَمَضَانَ .
Yahya related to me from Malik from Hisham ibn Urwa from his father that Dhakwan Abu Amr (a slave belonging to A'isha, the wife of the Prophet, may Allah bless him and grant him peace, who was freed by her after her death) used to stand in prayer and recite for her in Ramadan.
Reference Muwatta Malik 502540
USC-MSA web (English) reference : Book 6, Hadith 8