Musannaf Ibn Abi Shayba 16:421

Abu Bakr narrated to us, he said: Abd al-Rahim ibn Sulayman narrated to us, from Ubayd Allah ibn Umar, from Nafi, that Ibn Umar informed him that Umar saw a garment of silk (sira') and said: "O Messenger of Allah, if you were to buy this garment for the delegations and for Friday." He said: "Indeed, only he who has no share in the Hereafter wears this."