Narrated Abu Huraira:

I said, "O Allah's Apostle! I hear many narrations from you but I forget them." He said, "Spread your covering sheet." I spread my sheet and he moved both his hands as if scooping something and emptied them in the sheet and said, "Wrap it." I wrapped it round my body, and since then I have never forgotten a single Hadith.

حَدَّثَنِي إِبْرَاهِيمُ بْنُ الْمُنْذِرِ، حَدَّثَنَا ابْنُ أَبِي الْفُدَيْكِ، عَنِ ابْنِ أَبِي ذِئْبٍ، عَنِ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي سَمِعْتُ مِنْكَ كَثِيرًا فَأَنْسَاهُ. قَالَ " ابْسُطْ رِدَاءَكَ ". فَبَسَطْتُ فَغَرَفَ بِيَدِهِ فِيهِ، ثُمَّ قَالَ " ضُمَّهُ " فَضَمَمْتُهُ، فَمَا نَسِيتُ حَدِيثًا بَعْدُ.