Why was Fadak not granted to Fatima by Abu Bakr?

According to Qu'ran 8:41 >And know that anything you obtain of war booty - then indeed, for Allah is one fifth of it and for the Messenger and for [his] near relatives and the orphans, the needy, and the [stranded] traveler, if you have believed in Allah and in that which We sent down to Our Servant on the day of criterion - the day when the two armies met. And Allah, over all things, is competent. and Qu'ran 17:26 >And give the relative his right, and [also] the poor and the traveler, and do not spend wastefully. There is also 59:7 >And what Allah restored to His Messenger from the people of the towns - it is for Allah and for the Messenger and for [his] near relatives and orphans and the [stranded] traveler - so that it will not be a perpetual distribution among the rich from among you. And whatever the Messenger has given you - take; and what he has forbidden you - refrain from. And fear Allah ; indeed, Allah is severe in penalty. Yet Fadak, which was acquired through war, was not granted to Fatima by Abu Bakr, the first Caliph, after the Prophet (pbuh) passed away. What was Abu Bakrs reasoning given the explicit commandments in the ayats above and how valid was this in the view of later scholarship?