(Third chain) Abu Uthman says: We received a letter from Sayyiduna Umar (may Allah be pleased with him) while we were in Azerbaijan. It was written in it: O Utbah bin Farqad! Beware of luxury, adopting the appearance of the polytheists, and wearing silk garments, because the Noble Prophet (peace and blessings be upon him) forbade us from wearing silk, except for this much—at the same time, he (peace and blessings be upon him) raised his two fingers to clarify.