What did Prophet Muhammad (saw) say regarding offering the compulsory congregational prayer after a perfect ablution, as mentioned in the verse "Verily, those who conceal the clear signs and the guidance which we have sent down..."? (2:159)
 After      performing the ablution 'Uthman said, "I am going to tell you a Hadith     which I would not have told you, had I not been compelled by a certain     Holy Verse (the sub narrator 'Urwa said:                      This verse is: "Verily, those     who conceal the clear signs and the guidance which we have sent      down...)" (2:159). I heard the Prophet saying, 'If a man performs      ablution perfectly and then offers the compulsory congregational      prayer, Allah will forgive his sins committed between that (prayer)      and the (next) prayer till he offers it.