Sunan an-Nasa'i #916 · The Book of the Commencement of the Prayer

Sunan an-Nasa'iIt was narrated that Ibn Abbas said
Sunan an-Nasa'i · Book 11 · The Book of the Commencement of the Prayer
Sunan an-Nasa'i · كتاب 11 · كتاب افتتاح الصلاة
Concerning the words of Allah, the Mighty and Sublime: "Seven of Al-Mathani (seven repeatedly-recited): "The seven long ones
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ حَدَّثَنَا شَرِيكٌ، عَنْ أَبِي إِسْحَاقَ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، فِي قَوْلِهِ عَزَّ وَجَلَّ ‏{‏ سَبْعًا مِنَ الْمَثَانِي ‏}‏ قَالَ السَّبْعُ الطُّوَلُ ‏.‏
Reference : Sunan an-Nasa'i 916In-book reference : Book 11, Hadith 41