Sa‘d, from Musa bin al-Hasan, from Muhammad bin al-Husayn bin Abi al-Khattab, from al-Hasan bin Ali bin Faddal, from Abdillah bin Maymun al-Qaddah, from (Imam) Ja‘far bin Muhammad عليه السلام, from his father (Imam al Baqir عليه السلام): (Imam) Ali عليه السلام, peace be upon him, said: "The two prostrations of forgetfulness (‘sajdata al-sahw’) are to be performed after the ‘taslim’ and before speaking."