Chapter 64: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Narrated Al-Bara: We, the Companions of Muhammad used to say that the number of the warriors of Badr was the same
as the number of Saul' s companions who crossed the river (of Jordan) with him, and none crossed the
river with him but a believer, and the were over three-hundred-and-ten men.
Sahih al-Bukhari 3958