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

Ahmad ibn Muhammad ibn ‘Isa, from al-Hasan ibn Ali ibn Faddal, from Ubayd ibn Zurarah, who said: I said to Abu Abdillah عليه السلام, peace be upon him: “A man remembers that he did not perform the ‘qunut’ until after he bowed.” Imam عليه السلام said: "Then he should perform the ‘qunut’ when he raises his head."