The benefits of having wudu
عَنْ أَبِيْ هُرَيْرَةَ رَضِيَ اللهُ عَنْهُ قَالَ قَالَ سَمِعْتُ رَسُوْلُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُوْلُ اِنَّ أُمَّتِيْ يُدْعَوْنَ يَوْمَ الْقِيَامَةِ غُرًّا مُحَجَّلِيْنَ مِنْ أثَارِ الْوُضُوْءِ فَمَنِ اسْتَطَاعَ مِنْكُمْ أَنْ يُطِيْلَ غُرَّتَهٗ فَلْيَفْعَلْ – رواه البخاري باب فضل الوضوء والغرمحجلون
Meaning:
Abu Hurairah ( R ) stated he heard that Rasulullah ( صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ) said, surely my ummah ( Nation ) will be called in the day of Judgement 'Gurran muhazzaleen' (The person whose forehead, hands and legs are white ) for the cause of ablution, so whoever can lengthen his brightness, do so.