Musnad Ahmad 1034:74

Yahya ibn Abd al-Malik ibn Abi Ghaniyah narrated to us, my father narrated to us, from al-Hakam, from Abd al-Rahman ibn Abi Layla, from Hudhayfah, who said: I heard the Messenger of Allah, may Allah bless him and grant him peace, say: "Do not drink from gold or silver, and do not wear silk or brocade, for they are for them in this world, and they are for you in the Hereafter."