Muwatta Malik · Hadith 718
Yahya related to me from Malik from Yahya ibn Said that al-Qasim ibn Muhammad said that al-Furafisa ibn Umayr al-Hanafi saw Uthman ibn Affan at al-Arj, and he was covering his face while in ihram
Mauquf Sahih · Salim al-Hilali