Sayyiduna Uthman (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) forbade silk, except for the width of two fingers.
Imam al-Bazzar recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب اللباس / 8661