Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
nasai-kubra:10460Ḥumayd b. Masʿadah > Bishr > Shuʿbah > Abū Isḥāq > ʿAmr b. Maymūn

[Machine] The Messenger of Allah ﷺ said, "Is it beyond anyone of you to recite one-third of the Quran every night?" They said, "O Messenger of Allah, who among us is capable of that?" He said, "Is it not sufficient for him to recite 'Say: He is Allah, (the) One' for it is equivalent to one-third of the Quran." Abu Qays reported from Amr ibn Maymun, from Abu Mas'ud, and no one succeeded him in reporting it to me.  

الكبرى للنسائي:١٠٤٦٠أَخْبَرَنَا حُمَيْدُ بْنُ مَسْعَدَةَ قَالَ حَدَّثَنَا بِشْرٌ قَالَ حَدَّثَنَا شُعْبَةُ عَنْ أَبِي إِسْحَاقَ قَالَ سَمِعْتُ عَمْرَو بْنَ مَيْمُونٍ يَقُولُ {قُلْ هُوَ اللهُ أَحَدٌ} [الإخلاص 1] ثُلُثُ الْقُرْآنِ وَقَدْ رَوَاهُ عَطَاءٌ عَنْ أَبِي إِسْحَاقَ عَنِ ابْنِ مَسْعُودٍ قَالَ

قَالَ رَسُولُ اللهِ ﷺ أَيَعْجِزُ أَحَدُكُمْ أَنْ يَقْرَأَ ثُلُثَ الْقُرْآنِ كُلَّ لَيْلَةٍ؟ قَالُوا يَا رَسُولَ اللهِ وَمَنْ يَسْتَطِيعُ ذَلِكَ؟ قَالَ أَلَا يَقْرَأُ {قُلْ هُوَ اللهُ أَحَدٌ} [الإخلاص 1] فَإِنَّهَا تَعْدِلُ ثُلُثَ الْقُرْآنِ وَقَالَ أَبُو قَيْسٍ عَنْ عَمْرِو بْنِ مَيْمُونٍ عَنْ أَبِي مَسْعُودٍ وَلَمْ يُتَابِعْهُ أَحَدٌ عَلِمْتُهُ عَلَى ذَلِكَ