AL-'IKHLAS - CHAPTER 112 H 1024 "The Prophet, praise and peace be upon him, said concerning the recitation of the chapter Al-'lkhlas (The Oneness Ch.112): 'By Him in whose Hands is my life, it is equal to the recitation of one third of the Koran.' We are also informed: The Prophet, praise and peace be upon him, inquired of his Companions, 'Would any of you find it burdensome to recite one third of the Koran during the night?' They considered it difficult and said, 'Which of us is able to do that, O Messenger of Allah, praise and peace be upon him?' He said, 'Chapter Al-lkhlas is equal to one third of the Koran.'" R 1024 Bukhari with a chain up to Abu Sa'id Khudri who related that the Messenger of Allah, praise and peace be upon him, said this.
1010- وعن أَبي سعيد الخدري رضي الله عنه : أنَّ رسول الله صلى الله عليه وآله وسلم ، قَالَ في : [ قُلْ هُوَ اللهُ أَحَدٌ [ : "وَالَّذِي نَفْسِي بِيَدِهِ إنَّهَا لَتَعْدِلُ ثُلُثَ القُرْآنِ" . وفي روايةٍ : أن رسول الله صلى الله عليه وآله وسلم ، قَالَ لأَصْحَابِهِ : "أَيَعْجِزُ أحَدُكُمْ أنْ يَقْرَأَ بِثُلُثِ القُرْآنِ فِي لَيْلَةٍ" فَشَقَّ ذَلِكَ عَلَيْهِمْ ، وَقَالُوا : أيُّنَا يُطِيقُ ذَلِكَ يَا رسولَ الله ؟ فَقَالَ : "] قُلْ هُوَ اللهُ أَحَدٌ اللهُ الصَّمَدُ [ : ثُلُثُ الْقُرْآنِ" رواه البخاري .