Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 6039
Anas reported the king of Dumat al-Jandal presented to Allah's Messenger (may peace be upon him) the garment and lie made no mention (of the fact) that he prohibited the use of silk.