Sunan an-Nasa'i, Volume 1, Book 1, Hadith 145 (DarusSalam) ⓘ

It was narrated that Jami' bin Shaddad said: "I heard Humran bin Aban tell Abu Burdah in the Masjid that he heard 'Uthman narrating that the Messenger of Allah said: 'Whoever performs Wudu' completely as commanded by Allah, the five daily prayers will be an expiation for whatever comes in between them.'"

أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا خَالِدٌ، عَنْ شُعْبَةَ، عَنْ جَامِعِ بْنِ شَدَّادٍ، قَالَ سَمِعْتُ حُمْرَانَ بْنَ أَبَانَ، أَخْبَرَ أَبَا بُرْدَةَ، فِي الْمَسْجِدِ أَنَّهُ سَمِعَ عُثْمَانَ، يُحَدِّثُ عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏ "‏ مَنْ أَتَمَّ الْوُضُوءَ كَمَا أَمَرَهُ اللَّهُ عَزَّ وَجَلَّ فَالصَّلَوَاتُ الْخَمْسُ كَفَّارَاتٌ لِمَا بَيْنَهُنَّ ‏" ‏ ‏.‏