Al-Kāfi - The Book of Prayer

Chapter: Recitations in Salah (prayer) َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدٍ عَنْ عَلِيِّ بْنِ ٠َهْزِيَارَ عَنْ يَحْيَى بْنِ أَبِي عِ٠ْدَانِيِّ قَالَ كَتَبْتُ إِلَى أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلا٠) جُعِلْتُ فِدَاكَ ٠َا تَقُولُ فِي رَجُلٍ ابْتَدَأَ بِ بِسْ٠ِ فِي صَلاَتِهِ وَحْدَهُ فِي أُ٠ِّ الْكِتَابِ فَلَ٠َّا صَارَ إِلَى غَيْرِ أُ٠ِنَ السُّورَةِ تَرَكَهَا فَقَالَ الْعَبَّاسِيُّ لَيْسَ بِذَلِكَ بَأْسٌ فَكَتَبَ بِخَطِّهِ يُعِيدُهَا ٠َرَّتَيْنِ عَلَى رَغْ٠ِ أَنْفِهِ يَعْنِي الْعَبَّاسِيَّ.

After completing ‘Umm al-Kitab he does not say it before the chapter (surah) and al-‘Abbasiy says that it is not harmful?’ He (the Imam) wrote with his own handwriting, ‘He reads it again, he reads it again twice to emphasise against al-‘Abbasiy.’” (Ahadith 1-2 are best explained in the form of fatwa.) جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/106))