על החוקים לפרטיהם, ספר א ל׳On the Special Laws, Book I 30

א׳
1[151] In addition to all the rest it ordains that the priests who minister at the holy sacrifices should receive the hides of the whole-burnt-offerings, the number of which is incalculable, and this is no small gift, but represents a very large sum of money. From these things it is clear that the law did not provide the consecrated tribe with a single portion, like the others, but gave it, under the guise of first-fruits from every kind of sacrifice, a source of revenue of greater dignity and sanctity than that of them all put together.
ב׳
2[152] But that none of the donors should taunt the recipients, it ordered the first-fruits to be first brought into the temple and then taken thence by the priests.  It was the proper course that the first-fruits should be brought as a thank-offering to God by those whose life in all its aspects is blessed by His beneficence, and then by Him, since He needs nothing at all, freely bestowed with all dignity and honour on those who serve and minister in the temple. For if the gift is felt to come not from men but from the Benefactor of all, its acceptance carries with it no sense of shame.