All the tenth. The tithe of all fruits and flocks had been already claimed absolutely by the Lord (Le 27:30, 32). It is probable indeed that the giving of tithes had been more or less a matter of obligation from time immemorial.
Abraham had paid them on one memorable occasion (Genesis 14:20), and Jacob had vowed them on another (Genesis 28:22). From this time forth, however, the tithes were formally assigned to the maintenance of the Levites, in return for their service.