"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."  

سَمِعْتُ حُمْرَانَ يُحَدِّثُ أَبَا بُرْدَةَ فِي الْمَسْجِدِ أَنَّهُ سَمِعَ عُثْمَانَ بْنَ عَفَّانَ يُحَدِّثُ عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَتَمَّ الْوُضُوءَ كَمَا أَمَرَهُ اللَّهُ فَالصَّلَوَاتُ الْمَكْتُوبَاتُ كَفَّارَاتٌ لِمَا بَيْنَهُنَّ  

He was sitting with the Prophet who said: 'No person's prayer is complete until he performs ablution properly as Allah has commanded him, washing his face, his arms up to the elbows, wiping his head and his feet up to the ankles.'"  

أَنَّهُ كَانَ جَالِسًا عِنْدَ النَّبِيِّ ﷺ فَقَالَ إِنَّهَا لاَ تَتِمُّ صَلاَةٌ لأَحَدٍ حَتَّى يُسْبِغَ الْوُضُوءَ كَمَا أَمَرَهُ اللَّهُ تَعَالَى يَغْسِلُ وَجْهَهُ وَيَدَيْهِ إِلَى الْمِرْفَقَيْنِ وَيَمْسَحُ بِرَأْسِهِ وَرِجْلَيْهِ إِلَى الْكَعْبَيْنِ