If you come to a township (which has surrendered without a formal war) and stay therein, you have a share (that will be in the form of an award) in (the properties obtained from) it. If a township disobeys Allah and His Messenger (and actually fights against the Muslims) one-fifth of the booty seized therefrom is for Allah and His Apostle and the rest is for you.

The properties abandoned by Banu Nadir were the ones which Allah bestowed upon His Apostle for which no expedition was undertaken either with cavalry or camelry. These properties were particularly meant for the Prophet (ﷺ). He would meet the annual expenditure of his family from the income thereof, and would spend what remained for purchasing horses and weapons as preparation for Jihad.