عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ يُونُسَ قَالَ حَدَّثَنِي إِسْمَاعِيلُ بْنُ سَعْدٍ الْأَحْوَصُ قَالَ:
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قُلْتُ لِلرِّضَا ع كَمِ الصَّلَاةُ مِنْ رَكْعَةٍ فَقَالَ إِحْدَى وَ خَمْسُونَ رَكْعَةً. - مُحَمَّدُ بْنُ أَحْمَدَ بْنِ يَحْيَى عَنْ مُحَمَّدِ بْنِ عِيسَى مِثْلَهُ.
Read English translationHide English translationMuhammad Sarwar — attributed by Thaqalayn
16. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus who has said that narrated to him ’Isma‘il ibn Sa‘d al-Ahwas who has said the following: “I asked al-Rida (a.s.), ‘Of how many Rak‘at does Salah (prayer) consist?’ He replied, ‘There are fifty-one Rak‘at (every day).”’ Muhammad ibn Ahmad ibn Yahya has narrated from Muhammad ibn ‘Isa a similar Hadith.
Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.
Hadith gradings
1- صحيحAllamah Baqir al-MajlisiMirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/406)