Imam Abu Dawud : 1088
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ سَعْدٍ حَدَّثَنَا عَمِّي حَدَّثَنَا أَبِي عَنْ ابْنِ إِسْحَقَ عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ عَطَاءٍ عَنْ ذَكْوَانَ مَوْلَى عَائِشَةَ أَنَّهَا حَدَّثَتْهُأَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يُصَلِّي بَعْدَ الْعَصْرِ وَيَنْهَى عَنْهَا وَيُوَاصِلُ وَيَنْهَى عَنْ الْوِصَالِ
Narrated to us ['Ubaidullah bin Sa'd] narrated to us [my uncle] narrated to us [my father] from [Ibn Ishaq] from [Muhammad bin 'Amru bin 'Atha'] from [Dzakwan] the freed slave of Aishah that [Aishah] informed him that the Messenger of Allah shallallahu 'alaihi wasallam performed the (sunnah) prayer after Asr, then he forbade it, and he performed continuous fasting (wishal), then he forbade it.'