Sahih Muslim Book - 2, Hadith - 580

و حَدَّثَنِي هَارُونُ بْنُ سَعِيدٍ الْأَيْلِيُّ حَدَّثَنِي ابْنُ وَهْبٍ أَخْبَرَنِي عَمْرُو بْنُ الْحَارِثِ عَنْ سَعِيدِ بْنِ أَبِي هِلَالٍ عَنْ نُعَيْمِ بْنِ عَبْدِ اللَّهِ أَنَّهُ رَأَى أَبَا هُرَيْرَةَ يَتَوَضَّأُ فَغَسَلَ وَجْهَهُ وَيَدَيْهِ حَتَّى كَادَ يَبْلُغُ الْمَنْكِبَيْنِ ثُمَّ غَسَلَ رِجْلَيْهِ حَتَّى رَفَعَ إِلَى السَّاقَيْنِ ثُمَّ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ إِنَّ أُمَّتِي يَأْتُونَ يَوْمَ الْقِيَامَةِ غُرًّا مُحَجَّلِينَ مِنْ أَثَرِ الْوُضُوءِ فَمَنْ اسْتَطَاعَ مِنْكُمْ أَنْ يُطِيلَ غُرَّتَهُ فَلْيَفْعَلْ

It was narrated from Nu'aim bin 'Abdullah that he saw Abu Hurairah performing Wudu'. He washed his face and his hands almost up to the shoulders, then he washed his feet up to the calves. Then he said: "I heard the Messenger of Allah (s.a.w) say: 'On the Day of Resurrection, my Ummah will come with glimmering faces and limbs because of the traces of Wudu', so whoever among you is able to increase the brightness of his face, let him do so."'