Talmud do Powtórzonego Prawa 18:8

HALAKHAH: It is written¹⁴⁶Deut. 18:8. The verse stipulates that all priestly prebends have to be equally available to all priests but then permits interpriestly trade offs. This is interpreted to mean that on holidays all are equal but for the remainder of the year by general agreement (or, as stated later in the Halakhah, by institution of Samuel and David) all income of one week is reserved for the week’s watch. Babli 56a; Sifry Deut. 169., equal portions they shall eat. I could think also on the remaining days of the year it should be so, the verse says, except what was sold by the fathers, except what fathers sold for the sons; you on your week and I on my week.