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
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
And from him, from Ahmad ibn Muhammad ibn Abi Nasr, who said:
I said to Abu al-Hasan عليه السلام, peace be upon him: “May I be your ransom, the ‘tashahhud’ which is said in the second rak‘ah, is it sufficient if I say it in the fourth [rak‘ah] as well?” Imam عليه السلام said: “Yes.”
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 107