It was narrated from 'Uqbah bin 'Amir Al-Juhani that:He came to 'Umar bin Khattab from Egypt. 'Umar said: "How long has it been since you have taken off your leather socks?" He said: "From one Friday to the next." He said: "You have acted in accordance with the Sunnah."
حَدَّثَنَا أَحْمَدُ بْنُ يُوسُفَ السُّلَمِيُّ، حَدَّثَنَا أَبُو عَاصِمٍ، حَدَّثَنَا حَيْوَةُ بْنُ شُرَيْحٍ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنِ الْحَكَمِ بْنِ عَبْدِ اللَّهِ الْبَلَوِيِّ، عَنْ عَلِيِّ بْنِ رَبَاحٍ اللَّخْمِيِّ، عَنْ عُقْبَةَ بْنِ عَامِرٍ الْجُهَنِيِّ، أَنَّهُ قَدِمَ عَلَى عُمَرَ بْنِ الْخَطَّابِ مِنْ مِصْرَ فَقَالَ مُنْذُ كَمْ لَمْ تَنْزِعْ خُفَّيْكَ قَالَ مِنَ الْجُمُعَةِ إِلَى الْجُمُعَةِ . قَالَ أَصَبْتَ السُّنَّةَ .
IbnMaja
The Book of Purification and its Sunnah • Hadith 558