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.