Sahih Muslim Book - 5, Hadith - 1500

وَحَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ وَأَبُو الرَّبِيعِ كِلاَهُمَا عَنْ عَبْدِ الْوَارِثِ قَالَ شَيْبَانُ حَدَّثَنَا عَبْدُ الْوَارِثِ عَنْ أَبِى التَّيَّاحِ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ كَانَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- أَحْسَنَ النَّاسِ خُلُقًا فَرُبَّمَا تَحْضُرُ الصَّلاَةُ وَهْوَ فِى بَيْتِنَا فَيَأْمُرُ بِالْبِسَاطِ الَّذِى تَحْتَهُ فَيُكْنَسُ ثُمَّ يُنْضَحُ ثُمَّ يَؤُمُّ رَسُولُ اللَّهِ -صلى الله عليه وسلم- وَنَقُومُ خَلْفَهُ فَيُصَلِّى بِنَا وَكَانَ بِسَاطُهُمْ مِنْ جَرِيدِ النَّخْلِ.

It was narrated from Abu At-Tayyah, from Anas bin Malik who said: "The Messenger of Allah (s.a.w) had the best behavior of the people. Sometimes the time for prayer would come when he was in our house, so he would order that the mat beneath him be swept, then water sprinkled on it, then the Messenger of Allah (s.a.w) would lead the prayer; we would stand behind him and he would lead us in prayer." He said: "And their mat was made of palm leaves."