Sahih Bukhari Volume 6, Book 60, Hadith Number 422.

Narrated By Jabir bin Abdullah : A caravan of merchandise arrived at Medina on a Friday while we were with the Prophet All the people left (the Prophet and headed for the caravan) except twelve persons. Then Allah revealed:

‘But when they see some bargain or some amusement they disperse headlong to it.’…(62.11)