A man came to the Messenger of Allah ﷺ and said: Teach me to read the Qur'an, Messenger of Allah. He said: Read three surahs which begin with A.L.R. He said: My age is advanced, my mind has become dull (i.e. memory has grown weak), and my tongue has grown heavy). So he said: Then read three surahs which begin with H.M. He repeated the same words. So he said: Read three surahs which begin with the "Glorification of Allah". But he repeated the same excuse. The man then said: Teach me a comprehensive surah, Messenger of Allah. The Prophet ﷺ taught him Surah (99). "When the Earth is shaken with her earthquake". When he finished it, the man said: By Him Who sent you with truth, I shall never add anything to it. Then man then went away. The Prophet ﷺ said twice: The man received salvation. (Using translation from Abū Dāʾūd 1399)   

أَتَى رَجُلٌ رَسُولَ اللهِ ﷺ فَقَالَ أَقْرِئْنِي يَا رَسُولَ اللهِ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ «اقْرَأْ ثَلَاثًا مِنْ ذَاتِ الر» فَقَالَ الرَّجُلُ كَبِرَتْ سِنِيَّ وَاشْتَدَّ قَلْبِي وَغَلُظَ لِسَانِي قَالَ «اقْرَأْ ثَلَاثًا مِنْ ذَاتِ حم» فَقَالَ مِثْلَ مَقَالَتِهِ الْأُولَى قَالَ «اقْرَأْ ثَلَاثًا مِنَ الْمُسَبِّحَاتِ» فَقَالَ مِثْلَ مَقَالَتِهِ ثُمَّ قَالَ الرَّجُلُ وَلَكِنْ أَقْرِئْنِي سُورَةَ جَامِعَةً قَالَ فَاقْرَأْ {إِذَا زُلْزِلَتِ الْأَرْضُ زِلْزَالَهَا} [الزلزلة 1] حَتَّى فَرَغَ مِنْهَا فَقَالَ الرَّجُلُ وَالَّذِي بَعَثَكَ بِالْحَقِّ لَا أَزِيدُ عَلَيْهَا شَيْئًا أَبَدًا ثُمَّ أَدْبَرَ الرَّجُلُ فَقَالَ رَسُولُ اللهِ ﷺ «أَفْلَحَ الرُّوَيْجِلُ أَفْلَحَ الرُّوَيْجِلُ»