Musannaf Ibn Abi Shayba 16:432

Abu Bakr narrated to us, he said: Abd al-Rahim ibn Sulayman narrated to us, from al-Ifriqi, from Abd al-Rahman ibn Rafi, from Abdullah ibn Amr, who said: The Messenger of Allah (may Allah bless him and grant him peace) came out to us, and in one of his hands was a garment of silk, and in the other was gold. He said: "Indeed, these two are forbidden for the males of my nation, and lawful for their females."