Abu Hurairah reported,

Abu Hurairah said, "People say that Abu Hurairah narrates too much. Were it not for two verses in the Book of Allah, I would not have narrated a single hadith." Then he recited, "Those who conceal the clear proofs and guidance We have revealed, after Allah has made it plain to the people in the Scripture, they are cursed by Allah and cursed by those who curse," up to His words, "the Merciful" [Baqarah 2:159–160].He continued, "Our brothers among the Emigrants were kept busy by their trading in the markets, and our brothers among the Ansar were kept busy by the work on their properties, while Abu Hurairah stayed close to the Messenger of Allah ﷺ with nothing but enough food to fill his stomach. So he was present when they were not, and he memorized what they did not."In another narration he added, "The Messenger of Allah ﷺ said, 'Whoever spreads out his garment will never forget anything he has heard from me.' So I spread out my garment until he finished speaking, then I gathered it to my chest, and I never forgot a single thing I heard from him."

عن أبي هريرة قال

إن الناس يقولون: أكثر أبو هريرة، ولولا آيتان في كتاب الله ما حدثت حديثا، ثم يتلو: {إن الذين يكتمون ما أنزلنا من البينات والهدى من بعد ما بينه للناس في الكتب أولئك يلعنهم الله ويلعنهم اللاعنون} إلى قوله: {الرحيم} [سورة البقرة: ١٥٩-١٦٠]، إن إخواننا من المهاجرين كان يشغلهم الصفق بالأسواق، وإن إخواننا من الأنصار كان يشغلهم العمل في أموالهم، وإن أبا هريرة كان يلزم رسول الله ﷺ بشبع بطنه، ويحضر ما لا يحضرون، ويحفظ ما لا يحفظون. وزاد في رواية: فقال رسول الله ﷺ: من يبسط ثوبه فلن ينسى شيئا سمعه مني، فبسطت ثوبي حتى قضى حديثه، ثم ضممته إلي فما نسيت شيئا سمعته منه.