Abu Shaykh al-Huna'i (may Allah have mercy on him) said: I was with Mu'awiyah (may Allah be pleased with him) in a gathering of the Companions of the Messenger of Allah (peace and blessings be upon him), and Mu'awiyah (may Allah be pleased with him) said: I adjure you by Allah, do you know that the Messenger of Allah (peace and blessings be upon him) forbade wearing silk? They said: By Allah, yes. He said: And I too bear witness. Then he said: I adjure you by Allah, do you know that the Messenger of Allah (peace and blessings be upon him) forbade drinking from vessels of gold and silver? They said: By Allah, yes. He said: And I too bear witness.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16874