Volume 5, Book 59, Number 293:
Narrated Al-Bara:
The companions of (the Prophet) Muhammad who took part in Badr, told me that their number
was that of Saul’s (i.e. Talut’s) companions who crossed the river (of Jordan) with him and they were
over three-hundred-and-ten men. By Allah, none crossed the river with him but a believer. (See
Qur’an 2:249)