Narrated Abu Hurairah:

"There was a man among the Ansar who would sit with the Messenger of Allah ﷺ, and he would listen to the Ahadith of the Prophet ﷺ and he was amazed with them but he could not remember them. So he complained about that to the Messenger of Allah ﷺ. He said: 'O Messenger of Allah! I listen to your Ahadith and I am amazed but I can not remember them.' So the Messenger of Allah ﷺ said: 'Help yourself with your right hand' and he motioned with his hand as if writing.'"

حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا اللَّيْثُ، عَنِ الْخَلِيلِ بْنِ مُرَّةَ، عَنْ يَحْيَى بْنِ أَبِي صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ، قَالَ كَانَ رَجُلٌ مِنَ الأَنْصَارِ يَجْلِسُ إِلَى النَّبِيِّ ﷺ فَيَسْمَعُ مِنَ النَّبِيِّ ﷺ الْحَدِيثَ فَيُعْجِبُهُ وَلاَ يَحْفَظُهُ فَشَكَا ذَلِكَ إِلَى النَّبِيِّ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ إِنِّي أَسْمَعُ مِنْكَ الْحَدِيثَ فَيُعْجِبُنِي وَلاَ أَحْفَظُهُ . فَقَالَ رَسُولُ اللَّهِ ﷺ " اسْتَعِنْ بِيَمِينِكَ " . وَأَوْمَأَ بِيَدِهِ لِلْخَطِّ . وَفِي الْبَابِ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو .

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ إِسْنَادُهُ لَيْسَ بِذَلِكَ الْقَائِمِ . وَسَمِعْتُ مُحَمَّدَ بْنَ إِسْمَاعِيلَ يَقُولُ الْخَلِيلُ بْنُ مُرَّةَ مُنْكَرُ الْحَدِيثِ .