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 al-Nadr and Fadhala from Abdullah ibn Sinan from Hafs: Abu Abdillah عليه السلام said: “Indeed, the Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, was in prayer, and beside Him صلى الله عليه وعلى آله وسلم was al-Husayn ibn Ali عليه السلام, peace be upon him. The Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, said the Takbir, but al-Husayn عليه السلام did not follow with the Takbir. Then the Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, said the Takbir again, but al-Husayn عليه السلام, peace be upon him, still did not say the Takbir. The Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, continued to say the Takbir and was helping al-Husayn عليه السلام, peace be upon him, to say the Takbir, but He عليه السلام did not do so, until the Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, completed seven Takbirs, and then al-Husayn عليه السلام, peace be upon him, followed with the Takbir on the seventh.” Then Abu Abdillah عليه السلام said: “(Thus) So it became a Sunnah.”