Sahih Muslim 835
Sahih Muslim · Book 6: The Book of Prayer - Travellers · Concerning the two rak`ah that the Prophet (saws) used to pray after `Asr
Aswad and Masruq reported:
وَحَدَّثَنَا ابْنُ الْمُثَنَّى ، وَابْنُ، بَشَّارٍ قَالَ ابْنُ الْمُثَنَّى حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، عَنْ أَبِي إِسْحَاقَ ، عَنِ الأَسْوَدِ ، وَمَسْرُوقٍ ، قَالاَ نَشْهَدُ عَلَى عَائِشَةَ أَنَّهَا قَالَتْ مَا كَانَ يَوْمُهُ الَّذِي كَانَ يَكُونُ عِنْدِي إِلاَّ صَلاَّهُمَا رَسُولُ اللَّهِ صلى الله عليه وسلم فِي بَيْتِي . تَعْنِي الرَّكْعَتَيْنِ بَعْدَ الْعَصْرِ .
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.