Narrated Al-A'raj:

Abu Huraira said, "You people claim that Abu Huraira narrates many narrations of Allah's Apostle. (Anyhow) with Allah will be our appointment. I was a poor man, and used to stick to Allah's Apostle contented with what will fill my stomach, and the Muhajirin (emigrants) used to be busy trading in the markets, and the Ansar used to be busy looking after their properties. One-day I heard Allah's Apostle saying, 'Who will spread his Rida' (a garment covering the upper part of the body) till I finished my speech and then fold it, (i.e. wrap it over your body), in which case he will never forget anything he had heard from me." So I spread my garment which I was wearing;
and by Him Who sent Muhammad with the Truth, ever since, I have never forgotten whatever I heard from him (the Prophet)" (See, Hadith No. 119, Vol. 1)

حَدَّثَنَا عَلِيٌّ، حَدَّثَنَا سُفْيَانُ، حَدَّثَنِي الزُّهْرِيُّ، أَنَّهُ سَمِعَهُ مِنَ الأَعْرَجِ، يَقُولُ أَخْبَرَنِي أَبُو هُرَيْرَةَ، قَالَ إِنَّكُمْ تَزْعُمُونَ أَنَّ أَبَا هُرَيْرَةَ، يُكْثِرُ الْحَدِيثَ عَلَى رَسُولِ اللَّهِ ﷺ وَاللَّهُ الْمَوْعِدُ، إِنِّي كُنْتُ امْرَأً مِسْكِينًا أَلْزَمُ رَسُولَ اللَّهِ ﷺ عَلَى مِلْءِ بَطْنِي، وَكَانَ الْمُهَاجِرُونَ يَشْغَلُهُمُ الصَّفْقُ بِالأَسْوَاقِ، وَكَانَتِ الأَنْصَارُ يَشْغَلُهُمُ الْقِيَامُ عَلَى أَمْوَالِهِمْ، فَشَهِدْتُ مِنْ رَسُولِ اللَّهِ ﷺ ذَاتَ يَوْمٍ وَقَالَ " مَنْ يَبْسُطْ رِدَاءَهُ حَتَّى أَقْضِيَ مَقَالَتِي ثُمَّ يَقْبِضْهُ، فَلَنْ يَنْسَى شَيْئًا سَمِعَهُ مِنِّي ". فَبَسَطْتُ بُرْدَةً كَانَتْ عَلَىَّ، فَوَالَّذِي بَعَثَهُ بِالْحَقِّ مَا نَسِيتُ شَيْئًا سَمِعْتُهُ مِنْهُ.