عَنْ أَبِي الدَّرْدَاءِ رَضِيَ اللَّهُ عَنْهُ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ أَمَا يَسْتَطِيعُ أَحَدُكُمْ أَنْ يَقْرَأَ ثُلُثَ الْقُرْآنِ فِي لَيْلَةٍ قَالُوا نَحْنُ أَضْعَفُ مِنْ ذَلِكَ وَأَعْجَزُ قَالَ إِنَّ اللَّهَ عَزَّ وَجَلَّ جَزَّأَ الْقُرْآنَ ثَلَاثَةَ أَجْزَاءٍ فَجَعَلَ قُلْ هُوَ اللَّهُ أَحَدٌ [الإخلاص: 1] جُزْءًا مِنْ أَجْزَاءِ الْقُرْآنِ
Narrated by Sayyiduna Abu Darda (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Is it not possible for any one of you to recite one third of the Holy Qur'an in a single night? The people said: We are too weak and unable to do that. He (peace and blessings be upon him) said: Allah Almighty has made the Qur'an into three parts, and one of those parts is Surah Al-Ikhlas.