"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.'"  

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  

That the Messenger of Allah ﷺ gave an address. So he mentioned a story in the Hadith, and Abu Shah said: 'Have it written for me O Messenger of Allah! So the Messenger of Allah ﷺ said: 'Write it for Abu Shah.'"  

أَنَّ النَّبِيَّ ﷺ خَطَبَ فَذَكَرَ الْقِصَّةَ فِي الْحَدِيثِ قَالَ أَبُو شَاهٍ اكْتُبُوا لِي يَا رَسُولَ اللَّهِ فَقَالَ رَسُولُ اللَّهِ ﷺ اكْتُبُوا لأَبِي شَاهٍ وَفِي الْحَدِيثِ قِصَّةٌ  

that the heard Abu Hurairah say: "None of the Companions of the Messenger of Allah ﷺ narrated more Ahadith from him than me, except 'Abdullah bin 'Amr. For he used to write them down and I did not write."  

سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ لَيْسَ أَحَدٌ مِنْ أَصْحَابِ رَسُولِ اللَّهِ ﷺ أَكْثَرَ حَدِيثًا عَنْ رَسُولِ اللَّهِ ﷺ مِنِّي إِلاَّ عَبْدُ اللَّهِ بْنُ عَمْرٍو فَإِنَّهُ كَانَ يَكْتُبُ وَكُنْتُ لاَ أَكْتُبُ