Sahih Bukhari

Narrated Abu Huraira:I said, ""O Allah's Messenger (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