Al-Kāfi - The Book of Prayer

Chapter: Speaking During Salah (Prayer), or Turning Away Before Completion 8ـ عَلِيُّ بْنُ إِبْرَاهِي٠َ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُ٠َانَ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠ْتَ فِي الرَّكْعَتَيْنِ ٠ِنَ الظُّهْرِ أَوْ غَيْرِهِ٠ْ تَتَشَهَّدْ فِيهِ٠َا فَذَكَرْتَ ذَلِكَ فِي الرَّكْعَةِ الثَّالِثَةِ قَبْلَ أَنْ تَرْكَعَ فَاجْلِسْ فَتَشَهَّدْ وَقُ٠َّ صَلاَتَكَ فَإِنْ أَنْتَ لَ٠ْ تَذْكُرْ حَتَّى تَرْكَعَ فَا٠ْضِ فِي صَلاَتِكَ حَتَّى تَفْرُغَ فَإِذَا فَرَغْتَ فَاسْجُدْ سَجْدَتَيِ السَّهْوِ بَعْدَ التَّسْلِي٠ِ قَبْلَ أَنْ تَتَكَلَّ٠8.

Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad ibn ‘Uthman from al-Halabiy who has said the following: “Abu ‘Abd Allah (a.s.) has stated this Hadith.

He (the Imam) has said, ‘You may stand up in the two Rak‘at of al-Dhuhr or others without saying Tashahhud (testimonies of belief) and remember it in the third Rak‘at before Ruku‘ (bowing down on one’s knees), you must sit down, then say Tashahhud (testimonies of belief), then stand up and complete your Salah (prayer). In case, if you do not remember until Ruku‘, then continue your Salah (prayer) until the end.

When you complete it, then perform two Sajdah (prostration) because of mistake after Salam (the phrase of offering greeting of peace) and before speaking.’” حسن - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/206))