Narrated by Sa'd ibn Abdillah, from Musa ibn Ja'far, from Abu Ja'far, from al-Hasan ibn al-Husayn al-Lu’lu’i, from al-Hasan ibn Ali ibn Fadhal, from Abdullah ibn Bukayr, from Muhammad ibn Muslim: I heard Abu Abdillah عليه السلام say: "Whatever has passed from your prayer and purification, and you later remembered it in recollection, then continue with it, and there is no need for you to repeat it."