It is narrated from Sayyiduna Umar bin Khattab, may Allah be pleased with him, that the wealth of Banu Nadir was that which Allah Almighty gave to His Messenger as fay’ (spoils of war without battle). The Muslims had not made their horses and riding animals run to acquire this wealth, so this wealth was purely for the Messenger of Allah, peace and blessings be upon him (and he could dispose of it as he wished). Thus, the Prophet, peace and blessings be upon him, would keep provisions for his family for one year from it, and whatever remained, he would spend on horses and weapons in preparation for the cause of Allah.