It was narrated that Jami' bin Shaddad - AbuSakhrah - said:
"I heard Humran telling Abu Burdah in the mosque that he had heard 'Uthman bin 'Affan narrating that the Prophet had said" 'Whoever performs ablution perfectly as Allah has enjoined, then his prescribed prayer will serve as expiation for what is between them."
English reference: Vol. 1, Book 1, Hadith 459
Arabic reference: Book 1, Hadith 495