Hazrat Abu Hurairah radiyallahu anhu says, "I did not see anyone more handsome as Rasoolullah sallallahu alaihe wasallam. It was as if the brightness of the sun had shone from his auspicious face. I did not see anyone walk faster than him, as if the earth folded for him. A few moments ago he would be here, and then there. We found it difficult to keep pace when we walked with him, and he walked at his normal pace.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ‏:‏ حَدَّثَنَا ابْنُ لَهِيعَةَ، عَنْ أَبِي يُونُسَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ‏:‏ وَلا رَأَيْتُ شَيْئًا أَحْسَنَ مِنْ رَسُولِ اللهِ صلى الله عليه وسلم كَأَنَّ الشَّمْسَ تَجْرِي فِي وَجْهِهِ، وَمَا رَأَيْتُ أَحَدًا أَسْرَعَ فِي مِشْيَتِهِ مِنْ رَسُولِ اللهِ صلى الله عليه وسلم كَأَنَّمَا الأَرْضُ تُطْوَى لَهُ إِنَّا لَنُجْهِدُ أَنْفُسَنَا وَإِنَّهُ لَغَيْرُ مُكْتَرِثٍ‏.‏
English reference : Book 18, Hadith 116
Arabic reference : Book 19, Hadith 123