I said, "O Messenger of Allah ﷺ! 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.  

قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي سَمِعْتُ مِنْكَ كَثِيرًا فَأَنْسَاهُ قَالَ ابْسُطْ رِدَاءَكَ فَبَسَطْتُ فَغَرَفَ بِيَدِهِ فِيهِ ثُمَّ قَالَ ضُمَّهُ فَضَمَمْتُهُ فَمَا نَسِيتُ حَدِيثًا بَعْدُ