Man Lā Yaḥḍuruh al-Faqīh
Hadith 10001002 - وَ رَوَى زُرَارَةُ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ أَنَّهُ قَالَ: «إِذَا أَنْتَ كَبَّرْتَ فِي أَوَّلِ صَلاَتِكَ بَعْدَ اَلاِسْتِفْتَاحِ بِإِحْدَى وَ عِشْرِينَ تَكْبِيرَةً ثُمَّ نَسِيتَ اَلتَّكْبِيرَ كُلَّهُ أَوْ لَمْ تُكَبِّرْهُ أَجْزَأَكَ اَلتَّكْبِيرُ اَلْأَوَّلُ عَنْ تَكْبِيرَةِ اَلصَّلاَةِ كُلِّهَا.
Hadith.1002 – Zurarah narrated from Imam Muhammad ibn Ali Al-Baqir (as) that He said:
"When you say the Takbir at the beginning of your prayer after the opening Takbir (Takbir al-Ihram), if you say twenty-one Takbirs and then forget the remaining Takbirs, or fail to say them, the first Takbir will suffice for all the Takbirs in the prayer”.