عَنْ أَبِي أَيُّوبَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ أَيَعْجِبُ أَحَدُكُمْ أَنْ يَقْرَأَ ثُلُثَ الْقُرْآنِ فِي لَيْلَةٍ فَإِنَّهُ مَنْ قَرَأَ قُلْ هُوَ اللَّهُ أَحَدٌ اللَّهُ الصَّمَدُ [الإخلاص: 1-2] فِي لَيْلَةٍ فَقَدْ قَرَأَ لَيْلَتَئِذٍ ثُلُثَ الْقُرْآنِ
Narrated by Sayyiduna Abu Ayyub (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Does any one of you like that he should recite one third of the Qur'an in a single night? Whoever recited Surah Al-Ikhlas at night, he has recited one third of the Qur'an that night.