Abu Hurairah reported,

I said, "Messenger of Allah, I hear a great deal of hadith from you, but I forget it."He said, "Spread out your cloak."So I spread it out. He scooped with both his hands, then said, "Gather it up."I gathered it up, and I never forgot anything after that.

عن أبي هريرة قال

قلت يا رسول الله إني أسمع منك حديثا كثيرا أنساه، قال: ابسط رداءك. فبسطته، قال: فغرف بيديه، ثم قال: ضمه، فضممته، فما نسيت شيئا بعده.