الْحُسَيْنُ بْنُ مُحَمَّدٍ الْأَشْعَرِيُّ عَنْ عَبْدِ اللَّهِ بْنِ عَامِرٍ عَنْ عَلِيِّ بْنِ مَهْزِيَارَ عَنْ فَضَالَةَ عَنْ أَبَانٍ عَنِ الْفَضْلِ بْنِ عَبْدِ الْمَلِكِ أَوِ ابْنِ أَبِي يَعْفُورٍ عَنْ أَبِي عَبْدِ اللَّهِ ع أَنَّهُ قَالَ:
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فِي الرَّجُلِ يُصَلِّي فَلَمْ يَفْتَتِحْ بِالتَّكْبِيرِ هَلْ تُجْزِئُهُ تَكْبِيرَةُ الرُّكُوعِ قَالَ لَا بَلْ يُعِيدُ صَلَاتَهُ إِذَا حَفِظَ أَنَّهُ لَمْ يُكَبِّرْ.
Read English translationHide English translationMuhammad Sarwar — attributed by Thaqalayn
2. Al-Husayn ibn Muhammad al-Ash’ariy has narrated from ‘Abd Allah ibn ‘Amir from Ali ibn Mahziyar from Fadalah from Aban from al-Fadl ibn ‘Abd al-Malik or ibn abu Ya‘fur who has said the following: “About a man who performs Salah (prayer) but forgets to say the opening Takbir (Allah is great beyond description) if Takbir (Allah is great beyond description) for Ruku‘ (bowing down on one’s knees) is sufficient. Abu ‘Abd Allah (a.s.), has said, ‘It is not sufficient. He performs Salah (prayer) again when he finds out that he has not said the Takbir (Allah is great beyond description).”’
Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.
Hadith gradings
1- موثقAllamah Baqir al-MajlisiMirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/184)