Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.

And from him, from Abdullah al-Qaddah, from Ja‘far, from his father (Imam al Sadiq عليه السلام), peace be upon him): (Imam al Sadiq عليه السلام said): “(Imam) Ali عليه السلام, peace be upon him, was asked about a man who bowed but did not recite the tasbih due to forgetfulness. Imam عليه السلام said: "His prayer is complete."