People say that I have narrated many Hadiths (The Prophet's narration). Had it not been for two verses in the Qur'an, I would not have narrated a single Hadith, and the verses are: "Verily those who conceal the clear sign and the guidance which We have sent down . . . (up to) Most Merciful." (2:159-160). And no doubt our Muhajir (emigrant) brothers used to be busy in the market with their business (bargains) and our Ansari brothers used to be busy with their property (agriculture). But I (Abu Huraira) used to stick to Messenger of Allah ﷺ contented with what will fill my stomach and I used to attend that which they used not to attend and I used to memorize that which they used not to memorize.  

إِنَّ النَّاسَ يَقُولُونَ أَكْثَرَ أَبُو هُرَيْرَةَ وَلَوْلاَ آيَتَانِ فِي كِتَابِ اللَّهِ مَا حَدَّثْتُ حَدِيثًا ثُمَّ يَتْلُو {إِنَّ الَّذِينَ يَكْتُمُونَ مَا أَنْزَلْنَا مِنَ الْبَيِّنَاتِ} إِلَى قَوْلِهِ {الرَّحِيمُ} إِنَّ إِخْوَانَنَا مِنَ الْمُهَاجِرِينَ كَانَ يَشْغَلُهُمُ الصَّفْقُ بِالأَسْوَاقِ وِإِنَّ إِخْوَانَنَا مِنَ الأَنْصَارِ كَانَ يَشْغَلُهُمُ الْعَمَلُ فِي أَمْوَالِهِمْ وَإِنَّ أَبَا هُرَيْرَةَ كَانَ يَلْزَمُ رَسُولَ اللَّهِ ﷺ بِشِبَعِ بَطْنِهِ وَيَحْضُرُ مَا لاَ يَحْضُرُونَ وَيَحْفَظُ مَا لاَ يَحْفَظُونَ  

I said to Messenger of Allah ﷺ "I hear many narrations (Hadiths) from you but I forget them." Allah's Apostle said, "Spread your Rida' (garment)." I did accordingly and then he moved his hands as if filling them with something (and emptied them in my Rida') and then said, "Take and wrap this sheet over your body." I did it and after that I never forgot any thing. Narrated Ibrahim bin Al-Mundhir: Ibn Abi Fudaik narrated the same as above (Hadith...119) but added that the Prophet ﷺ had moved his hands as if filling them with something and then he emptied them in the Rida' of Abu Huraira.  

قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي أَسْمَعُ مِنْكَ حَدِيثًا كَثِيرًا أَنْسَاهُ قَالَ ابْسُطْ رِدَاءَكَ فَبَسَطْتُهُ قَالَ فَغَرَفَ بِيَدَيْهِ ثُمَّ قَالَ ضُمُّهُ فَضَمَمْتُهُ فَمَا نَسِيتُ شَيْئًا بَعْدَهُ حَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ قَالَ حَدَّثَنَا ابْنُ أَبِي فُدَيْكٍ بِهَذَا أَوْ قَالَ غَرَفَ بِيَدِهِ فِيهِ  

I have memorized two kinds of knowledge from Messenger of Allah ﷺ . I have propagated one of them to you and if I propagated the second, then my pharynx (throat) would be cut (i.e. killed).  

حَفِظْتُ مِنْ رَسُولِ اللَّهِ ﷺ وِعَاءَيْنِ فَأَمَّا أَحَدُهُمَا فَبَثَثْتُهُ وَأَمَّا الآخَرُ فَلَوْ بَثَثْتُهُ قُطِعَ هَذَا الْبُلْعُومُ