Bukahri Volume 2, Book 13, Number 59: Narrated Jabir bin 'Abdullah: While we were praying (Jumua Khutba & prayer) with the Prophet (p.b.u.h), some camels loaded with food, arrived (from Sham) The people diverted their attention towards the camels (and left the mosque), and only twelve persons remained with the Prophet. So this verse was revealed: "But when they see Some bargain or some amusement, They disperse headlong to it, And leave you standing." (62.11)
Bukhari Volume 4, Book 52, Number 276: Narrated Al-Bara bin Azib: The Prophet appointed 'Abdullah bin Jubair as the commander of the infantry men (archers) who were fifty on the day (of the battle) of Uhud. He instructed them, "Stick to your place, and don't leave it even if you see birds snatching us, till I send for you; and if you see that we have defeated the infidels and made them flee, even then you should not leave your place till I send for you." Then the infidels were defeated. By Allah, I saw the women fleeing lifting up their clothes revealing their leg-bangles and their legs. So, the companions of 'Abdullah bin Jubair said, "The booty! O people, the booty ! Your companions have become victorious, what are you waiting for now?" 'Abdullah bin Jubair said, "Have you forgotten what Allah's Apostle said to you?" They replied, "By Allah! We will go to the people (i.e. the enemy) and collect our share from the war booty." But when they went to them, they were forced to turn back defeated. At that time Allah's Apostle in their rear was calling them back. Only twelve men remained with the Prophet and the infidels martyred seventy men from us.