Chapter on the Manner of Prayer, Explanation of the Fifty-One Rak‘ahs; The Order, Recitation, Tasbih in Bowing and Prostration, Qunut, and What is Obligatory and Recommended Therein

Sa‘d ibn Abdullah from Ahmad ibn Muhammad ibn Isa from al-Husayn ibn Sa‘id, and Muhammad ibn Khalid al-Barqi, and al-‘Abbas ibn Ma‘ruf from al-Qasim ibn ‘Urwah from Hisham ibn Salim who said: I asked Abu Abdillah عليه السلام about the ‘tasbih’ in ‘ruku’ and ‘sujud’. Imam عليه السلام said: “In ‘ruku’, say: ‘Subhana Rabbiyal-‘Azim (Glory be to my Lord عز وجل, the Great)’, and in ‘sujud’, say: ‘Subhana Rabbiyal-A‘la (Glory be to my Lord عز وجل, the Most High)’. The obligation in that is one ‘tasbih’, the Sunnah is three, and the excellence is in saying it seven times.”