حَدَّثَنَا مُحَمَّدُ بْنُ مَرْزُوقٍ أَبُو عَبْدِ اللهِ، قَالَ: حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ قَيْسٍ أَبُو مُعَاوِيَةَ، قَالَ: حَدَّثَنَا هِشَامٌ، عَنْ مُحَمَّدٍ، عَنْ أَبِي هُرَيْرَةَ
قَالَ: كَانَ لِنَعْلِ رَسُولِ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قِبَالانِ وَأَبِي بَكْرٍ وَعُمَرَ، وَأَوَّلُ مَنْ عَقَدَ عَقْدًا وَاحِدًا عُثْمَانُ رضي الله عنه
“The sandals of the Messenger of Allah (sallallahu alayhi wa sallam) had two thongs, as did those of Abu Bakr and Umar (may Allah the Exalted be well pleased with them), and the first to tie a single knot was Uthman (may Allah be well pleased with him).”
Ash-Shama'il 84, Book 11, The Shoes Of Rasoolullah, Hadith 11. 1 min read