It was narrated from 'Abdullah bin 'Umar that 'Umar bin Khattab saw a silken two piece suit (being offered for sale). He said: "0 Messenger of Allah, why don't you buy this two piece suit (to wear for meeting) the delegations, and on Fridays?" The Messenger of Allah P.B.U.H said: "This is only worn by one who has no share in the Hereafter:' (Sahih)