Musannaf Ibn Abi Shayba 16:427

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Shu’bah, from Sa’d ibn Ibrahim, from his father, who said: ‘Abd al-Rahman ibn ‘Awf entered upon ‘Umar, and with him was a son of his, while he (the son) was wearing a silk shirt. So he (Umar) tore the shirt.