[Machine] I heard Ikrimah bin Sulaiman saying, "I read upon Ismail bin Abdullah bin Qustantini. When I reached the verse of Ad-Duha, he said to me, 'Say Allahu Akbar at the end of every chapter until you finish.' Abdullah bin Kathir informed him that Mujahid had read upon him and commanded him to do so. Mujahid informed him that Ibn Abbas had commanded him to do so. Ibn Abbas informed him that Ubayy bin Ka'b had commanded him to do so. And Ubayy bin Ka'b informed him that the Prophet ﷺ had commanded him to do so."  

سَمِعْتُ عِكْرِمَةَ بْنَ سُلَيْمَانَ يَقُولُ قَرَأْتُ عَلَى إِسْمَاعِيلَ بْنِ عَبْدِ اللَّهِ بْنِ قُسْطَنْطِينَ فَلَمَّا بَلَغْتُ وَالضُّحَى قَالَ لِي «كَبِّرْ كَبِّرْ عِنْدَ خَاتِمَةِ كُلِّ سُورَةٍ حَتَّى تَخَتِمَ» وَأَخْبَرَهُ عَبْدُ اللَّهِ بْنُ كَثِيرٍ أَنَّهُ قَرَأَ عَلَى مُجَاهِدٍ فَأَمَرَهُ بِذَلِكَ وَأَخْبَرَهُ مُجَاهِدُ أَنَّ ابْنَ عَبَّاسٍ أَمَرَهُ بِذَلِكَ وَأَخْبَرَهُ ابْنُ عَبَّاسٍ أَنَّ أُبَيَّ بْنَ كَعْبٍ أَمَرَهُ بِذَلِكَ وَأَخْبَرَهُ أُبَيُّ بْنُ كَعْبٍ أَنَّ النَّبِيَّ ﷺ أَمَرَهُ بِذَلِكَ