Sahih Bukhari
Sahih Bukhari Volume 007, Book 072, Hadith Number 726.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 72. Dress
Narrated By 'Umar bin Al-Khattab : Allah's Apostle said, "None wears silk in this world, but he who will have no share in the Hereafter."