مُوَطَّأُ مَالِكٍ
Muwatta Malik 638
Fasting
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عَائِشَةَ، وَحَفْصَةَ، زَوْجَىِ النَّبِيِّ صلى الله عليه وسلم بِمِثْلِ ذَلِكَ .
Yahya related to me from Malik from Ibn Shihab that A'isha and Hafsa, the wives of the Prophet, (ﷺ), also said that.
Arabic/English book reference: Book 18, Hadith 5