You have today done something that you have not been accustomed to before. He (the Holy Prophet) said: 0 'Umar, I have done that on purpose.  

أَنَّ النَّبِيَّ ﷺ صَلَّى الصَّلَوَاتِ يَوْمَ الْفَتْحِ بِوُضُوءٍ وَاحِدٍ وَمَسَحَ عَلَى خُفَّيْهِ فَقَالَ لَهُ عُمَرُ لَقَدْ صَنَعْتَ الْيَوْمَ شَيْئًا لَمْ تَكُنْ تَصْنَعُهُ قَالَ عَمْدًا صَنَعْتُهُ يَا عُمَرُ