Mistake in Recitation

1. Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan from Hammad ibn ‘Isa from Rib‘i ibn ‘Abd Allah from Muhammad ibn Muslim who has said the following: “One of the two Imam, ‘Alayhim al-Salam, has said, ’Allah has made Ruku‘ (bowing down on one’s knees) and Sujud (prostrations) obligatory. Recitation is Sunnah. Whoever omits recitation willfully performs Salah (prayer) again. Whoever forgets recitation his Salah (prayer) is complete and he is not obligated for anything in this matter.’”