Musannaf Ibn Abi Shayba 16:412

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Uthman ibn Abi Hind, he said: I saw upon Abu Ubaydah a *mutarraf* (a garment with borders) of silk, and I saw upon Umar ibn Abd al-Aziz a white *mutarraf* of silk.