From him, from Ahmad ibn al-Hasan, from Amr ibn Sa'id, from Musaddiq ibn Sadaqah, from Ammar al-Sabati, from Abu Abdillah عليه السلام, peace be upon him, who said: I asked Imam al-Sadiq عليه السلام about a man who forgets while he is behind the imam (of prayer), to say the tasbih in prostration or in bowing, or he forgets to say anything between the two prostrations. Imam عليه السلام said: “There is nothing upon him.”