There was a Sahabi (R.A) who used to listen Ahadith from Prophet (ﷺ) but he used to forget, he told to Prophet (ﷺ) about this, the Prophet (ﷺ) moved both his hands as if scooping something and emptied them in the covering sheet of that Sahabi (R.A), and after that he never forgot any Hadith, who was that lucky Sahabi (R.A)?