Sahih Muslim Book - 2, Hadith - 586

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا خَلَفٌ يَعْنِي ابْنَ خَلِيفَةَ عَنْ أَبِي مَالِكٍ الْأَشْجَعِيِّ عَنْ أَبِي حَازِمٍ قَالَ كُنْتُ خَلْفَ أَبِي هُرَيْرَةَ وَهُوَ يَتَوَضَّأُ لِلصَّلَاةِ فَكَانَ يَمُدُّ يَدَهُ حَتَّى تَبْلُغَ إِبْطَهُ فَقُلْتُ لَهُ يَا أَبَا هُرَيْرَةَ مَا هَذَا الْوُضُوءُ فَقَالَ يَا بَنِي فَرُّوخَ أَنْتُمْ هَاهُنَا لَوْ عَلِمْتُ أَنَّكُمْ هَاهُنَا مَا تَوَضَّأْتُ هَذَا الْوُضُوءَ سَمِعْتُ خَلِيلِي صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ تَبْلُغُ الْحِلْيَةُ مِنْ الْمُؤْمِنِ حَيْثُ يَبْلُغُ الْوَضُوءُ.

It was narrated that Abu Hazim said: "I was behind Abu Hurairah while he was performing Wudu' for Salat. He washed his hand until he reached his armpit. I said to him: 'O Abu Hurairah! What is this Wudu'?' He said: 'O Banu Farrukh, Are you here? If I had known that you were here I would not have performed Wudu' in this manner. I heard my close friend [s.a.w] say: "Adornment (in the Hereafter) will reach as far as the Wudu' reached."