Messenger of Allah said: "When a Muslim, or believer, performs Wudu', washing his face, every evil that he looked at with his eyes leaves with the water - or with the last drop of water, or an expression similar to that - and when he washes his hands, every evil he did with his hands leaves with the water - or with the last drop of water - until he becomes free of sin."  

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا تَوَضَّأَ الْعَبْدُ الْمُسْلِمُ أَوِ الْمُؤْمِنُ فَغَسَلَ وَجْهَهُ خَرَجَتْ مِنْ وَجْهِهِ كُلُّ خَطِيئَةٍ نَظَرَ إِلَيْهَا بِعَيْنَيْهِ مَعَ الْمَاءِ أَوْ مَعَ آخِرِ قَطْرِ الْمَاءِ أَوْ نَحْوِ هَذَا وَإِذَا غَسَلَ يَدَيْهِ خَرَجَتْ مِنْ يَدَيْهِ كُلُّ خَطِيئَةٍ بَطَشَتْهَا يَدَاهُ مَعَ الْمَاءِ أَوْ مَعَ آخِرِ قَطْرِ الْمَاءِ حَتَّى يَخْرُجَ نَقِيًّا مِنَ الذُّنُوبِ