Sahih Bukhari | Volume 7 | Hadith Number 732
Narrated by Abdullah bin Umar
'Umar saw a silk suit being sold, so he said, "O Allah's Apostle! Why don't you buy it so that you may wear it when delegates come to you, and also on Fridays?" The Prophet said, "This is worn only by him who has no share in the Hereafter." Afterwards the Prophet sent to 'Umar a silk suit suitable for wearing. 'Umar said to the Prophet, "You have given it to me to wear, yet I have heard you saying about it what you said?" The Prophet said, "I sent it to you so that you might either sell it or give it to somebody else to wear."