A caravan arrived (at Medina) while we were offering the Jumua prayer with the Prophet. The people
left out for the caravan, with the exception of twelve persons. Then this Verse was revealed: 'But
when they see some bargain or some amusement, they disperse headlong to it and leave you
standing." (62.11)
Sahih al-Bukhari Book 34, Hadith 17