Al-Kāfi - The Book of Prayer

Chapter: Performing Optional Salah (Prayer) before or after, Compensatory prayer for them and Salah (prayer) of al-Duha’ َدُ بْنُ عَبْدِ الله عَنْ أَحْ٠َدَ بْنِ أَبِي عَبْدِ الله عَنْ أَبِيهِ عَنْ عَبْدِ الله بْنِ الْفَضْلِ النَّوْفَلِيِّ عَنْ عَلِيِّ بْنِ أَبِي حَ٠ْزَةَ قَالَ سَأَلْتُ أَبَا الْحَسَنِ (عَلَيْهِ الْسَّلا٠) عَنِ الرَّجُلِ الْ٠َا الَّذِي يُجْزِئُهُ فِي النَّافِلَةِ قَالَ ثَلاَثُ تَسْبِيحَاتٍ فِي الْقِرَاءَةِ وَتَسْبِيحَةٌ فِي الرُّكُوعِ وَتَسْبِيحَةٌ فِي السُّجُودِ.

What is sufficient for him in optional Salah (prayer) for recitation?’ He (the Imam) said, ‘Three Tasbih (Allah is free of all defects) for recitation, one for Ruku‘ (bowing down on one’s knees), and one for Sujud (prostrations).”’ جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/422))