Abu Dawud Book 27, Hadith Number 4029.

Chapter : Wearing silk.

Narated By N/A : ‘Abd Allah b. ‘Umar said: ‘Umar b. al-Khattab saw that a striped robe containing silk was being sold at the gate of the mosque. He said: Apostle of Allah, would that you purchased it and wore it on Friday and when a delegation came to you. The Apostle of Allah (may peace be upon him) said: Only he who has no portion in the next world wears this (silk): Then the Apostle of Allah (may peace be upon. him) came in possession of some robes made of silk and gave one of them to Umar b. al-Khattab. ‘Umar said: Apostle of Allah, you are clothing me with it, but you said about the robe of ‘Utairid what you said. The Apostle of Allah (may peace be upon him) said: I did not give it to you so that you may wear it. So ‘Umar b. al-Khattab gave it to his brother who was a polytheist in Mecca to wear it.