Sahih Muslim 1937
صحيح مسلم#1937SahihAswad and Masruq reported:We bear testimony to the fact that 'A'isha said: Never was there a day that he (the Holy Prophet) was with me and he did not observe two rak'ahs of prayer in my house, i. e. two rak'ahs after the Asr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 6:365