Narrated Al-Bara bin Azib:
The Prophet appointed 'Abdullah bin Jubair as the commander of the infantry during the battle of Uhud. They returned defeated, and that is what is meant by:-- "And the Apostle was calling them back in the rear. None remained with the Prophet then, but twelve men."
Sahih al-Bukhari, Vol. 6, Book of Prophetic Commentary on the Qur'an, Hadith 84
Sahih al-Bukhari, Book of Prophetic Commentary on the Qur'an, Hadith 84