"The Messenger of Allah said: 'When anyone of you performs ablution and does it well, then he comes to the mosque for no other purpose than prayer, he does not take one step but Allah will raise him one degree (in status) thereby, and remove one sin from him thereby, until he enters the mosque.'"  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ أَحَدَكُمْ إِذَا تَوَضَّأَ فَأَحْسَنَ الْوُضُوءَ ثُمَّ أَتَى الْمَسْجِدَ لاَ يَنْهَزُهُ إِلاَّ الصَّلاَةُ لَمْ يَخْطُ خَطْوَةً إِلاَّ رَفَعَهُ اللَّهُ ﷻ بِهَا دَرَجَةً وَحَطَّ عَنْهُ بِهَا خَطِيئَةً حَتَّى يَدْخُلَ الْمَسْجِدَ  

The Messenger of Allah said: "Whoever performs ablution and rinses his mouth and nose, his sins will exit through his mouth and nose. When he washes his face, his sins will exit from his face, even from beneath his eyelids. When he washes his hands, his sins will exit from his hands. When he wipes his head, his sins will exit from his head, and even from his ears. When he washes his feet, his sins will exit from his feet, even from beneath his toenails. Then his prayer and walking towards the mosque will earn extra merit for him."  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَنْ تَوَضَّأَ فَمَضْمَضَ وَاسْتَنْشَقَ خَرَجَتْ خَطَايَاهُ مِنْ فَمِهِ وَأَنْفِهِ فَإِذَا غَسَلَ وَجْهَهُ خَرَجَتْ خَطَايَاهُ مِنْ وَجْهِهِ حَتَّى تَخْرُجَ مِنْ تَحْتِ أَشْفَارِ عَيْنَيْهِ فَإِذَا غَسَلَ يَدَيْهِ خَرَجَتْ خَطَايَاهُ مِنْ يَدَيْهِ فَإِذَا مَسَحَ رَأْسَهُ خَرَجَتْ خَطَايَاهُ مِنْ رَأْسِهِ حَتَّى تَخْرُجَ مِنْ أُذُنَيْهِ فَإِذَا غَسَلَ رِجْلَيْهِ خَرَجَتْ خَطَايَاهُ مِنْ رِجْلَيْهِ حَتَّى تَخْرُجَ مِنْ تَحْتِ أَظْفَارِ رِجْلَيْهِ وَكَانَتْ صَلاَتُهُ وَمَشْيُهُ إِلَى الْمَسْجِدِ نَافِلَةً  

"The Messenger of Allah said: 'When a person performs ablution and washes his hands, his sins exit through his hands. When he washes his face, his sins exit through his face. When he washes his forearms and wipes his head, his sins exit though his forearms and head. When he washes his feet, his sins exit through his feet.'"  

قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ الْعَبْدَ إِذَا تَوَضَّأَ فَغَسَلَ يَدَيْهِ خَرَّتْ خَطَايَاهُ مِنْ يَدَيْهِ فَإِذَا غَسَلَ وَجْهَهُ خَرَّتْ خَطَايَاهُ مِنْ وَجْهِهِ فَإِذَا غَسَلَ ذِرَاعَيْهِ وَمَسَحَ بِرَأْسِهِ خَرَّتْ خَطَايَاهُ مِنْ ذِرَاعَيْهِ وَرَأْسِهِ فَإِذَا غَسَلَ رِجْلَيْهِ خَرَّتْ خَطَايَاهُ مِنْ رِجْلَيْهِ  

"It was said: 'O Messenger of Allah, how will you recognize those whom you have not seen of your Ummah?' He said: 'From the blazes of their foreheads and feet, like horses with black and white traces (which make them distinct from others) which are the traces of ablution.'" (Hasan) Another chain with similar wording.  

قِيلَ يَا رَسُولَ اللَّهِ كَيْفَ تَعْرِفُ مَنْ لَمْ تَرَ مِنْ أُمَّتِكَ قَالَ غُرٌّ مُحَجَّلُونَ بُلْقٌ مِنْ آثَارِ الطُّهُورِ قَالَ أَبُو الْحَسَنِ الْقَطَّانُ حَدَّثَنَا أَبُو حَاتِمٍ حَدَّثَنَا أَبُو الْوَلِيدِ فَذَكَرَ مِثْلَهُ  

"I saw 'Uthman bin 'Affan sitting in Maqa'id. He called for water and he performed ablution, the he said: 'I saw the Messenger of Allah sitting in this place where I am sitting, performing ablution as I have done. Then he said: "Whoever performs ablution as I have done, his previous sins will be forgiven." And the Messenger of Allah said: "And do not be conceited (due to this great virtue)." (Sahih) Another chain with similar wording.  

رَأَيْتُ رَسُولَ اللَّهِ ﷺ فِي مَقْعَدِي هَذَا تَوَضَّأَ مِثْلَ وُضُوئِي هَذَا ثُمَّ قَالَ مَنْ تَوَضَّأَ مِثْلَ وُضُوئِي هَذَا غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ وَقَالَ رَسُولُ اللَّهِ ﷺ وَلاَ تَغْتَرُّوا حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ حَدَّثَنَا عَبْدُ الْحَمِيدِ بْنُ حَبِيبٍ حَدَّثَنَا الأَوْزَاعِيُّ حَدَّثَنِي يَحْيَى حَدَّثَنِي مُحَمَّدُ بْنُ إِبْرَاهِيمَ حَدَّثَنِي عِيسَى بْنُ طَلْحَةَ حَدَّثَنِي حُمْرَانُ عَنْ عُثْمَانَ عَنِ النَّبِيِّ ﷺ نَحْوَهُ