Chapter on the Rulings on Forgetfulness (Ahkam al-Sahw)
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 16
مُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ اَلْفَضْلِ بْنِ شَاذَانَ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ حَرِيزٍ عَنِ اَلْفُضَيْلِ بْنِ يَسَارٍ عَنْ أَبِي جَعْفَرٍ وَ أَبِي عَبْدِ اَللَّهِ عَلَيْهِمَا اَلسَّلاَمُ أَنَّهُمَا قَالاَ:« إِنَّمَا لَكَ مِنْ صَلاَتِكَ مَا أَقْبَلْتَ عَلَيْهِ مِنْهَا فَإِنْ أَوْهَمَهَا كُلَّهَا أَوْ غَفَلَ عَنْ أَدَائِهَا لُفَّتْ فَضُرِبَ بِهَا وَجْهُ صَاحِبِهَا»
Muhammad ibn Isma‘il from al-Fadl ibn Shadhan from Hammad ibn Isa from Hariz from al-Fudayl ibn Yasar from Abu Ja‘far عليه السلام and Abu Abdillah عليه السلام, peace be upon them both:
(Imam عليه السلام) said: "You are granted from your prayer only that portion of it to which you give your attention. So if you are heedless of it entirely, or neglect its performance, it is wrapped up and struck against the face of its performer."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 368
- Ṣaḥīḥ al-Tahdhīb, p. 230