حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، أَنَّهُ قَالَ أَخْبَرَنِي الْفُرَافِصَةُ بْنُ عُمَيْرٍ الْحَنَفِيُّ، أَنَّهُ رَأَى عُثْمَانَ بْنَ عَفَّانَ بِالْعَرْجِ يُغَطِّي وَجْهَهُ وَهُوَ مُحْرِمٌ ‏.‏

Yahya related to me from Malik from Yahya ibn Said that al-Qasimibn Muhammad said that al-Furafisa ibn Umayr al-Hanafi saw Uthman ibnAffan at al-Arj, and he was covering his face while in ihram. Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 721
Web Ref:  Muwatta Imam Malik Book 20 Hadith 13