Mishkat al-Masabih
Mishkat al-Masabih 2127, 2128
وَعَنْ أَبِي الدَّرْدَاءِ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَيَعْجَزُ أَحَدُكُمْ أَنْ يَقْرَأَ فِي لَيْلَةٍ ثُلُثَ الْقُرْآنِ؟» قَالُوا: وَكَيْفَ يَقْرَأُ ثُلُثَ الْقُرْآنِ؟ قَالَ: «قُلْ هُوَ الله أحد» يعدل ثلث الْقُرْآن ". رَوَاهُ مُسلم وَرَوَاهُ البُخَارِيّ عَن أبي سعيد
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Abu al-Darda reported that the Messenger of Allah (peace and blessings be upon him) said: ‘Is any of you unable to recite a third of the Quran in one night?’ They said: ‘How can one recite a third of the Quran?’ He said: ‘Say, “He is Allah, One” is equivalent to a third of the Quran.’ Muslim transmitted it. Al-Bukhari also transmitted it from Abu Said.