Al-Kāfi - The Book of Prayer

Chapter: The Optional Salah (prayer) 16ـ عَلِيُّ بْنُ إِبْرَاهِي٠َّدِ بْنِ عِيسَى عَنْ يُونُسَ قَالَ حَدَّثَنِي إِسْ٠َاعِيلُ بْنُ سَعْدٍ الأحْوَصُ قَالَ قُلْتُ لِلرِّضَا (عَلَيْهِ الْسَّلا٠ِنْ رَكْعَةٍ فَقَالَ إِحْدَى وَخَ٠ْسُونَ رَكْعَةً. ٠َدَ بْنِ يَحْيَى عَنْ ٠َّدِ بْنِ عِيسَى ٠16.

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. صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/406))