‘Ali told that God’s messenger was presented with a striped robe containing silk and sent it to him, but when ‘Ali wore it he saw he was looking angry. He then said, “I did not send it to you to wear, but only to cut it up into veils for the women."
(Bukhari and Muslim.)
Hudhaifa told that God’s messenger forbade them to eat or drink from a vessel of silver or gold, or to wear or sit upon silk and brocade.
(Bukhari and Muslim.)
‘Umar said the Prophet forbade wearing silk except to this extent, which was indicated by God's messenger raising his middle and forefinger and joining them.
(Bukhari and Muslim.)
A version by Muslim tells that in an address given by him at al-Jabiya (a town to the east of the Sea of Galilee, north of the Yarmuk battlefield. ‘Umar went there before the fall of Jerusalem.) he said God’s messenger forbade wearing silk except to the extent of two, three, or four fingers.