Talmud su Deuteronomio 18:6

From where that a Cohen presents his sacrifices during [the period of duty of] any watch¹³⁵The land of Israel was divided into 24 districts and the priests from each district came to the Temple for one week (serving as watch from the presentation of the shew-bread on one Sabbath to its removal the next Sabbath). The priests were indemnified for their work by receiving the skins of most holy sacrifices and all gifts to priests during their week of work. A hint of this is found in Deut. 18:9.
Even after the destruction of the Temple, the calendar of service of the districts was retained for special occasions, cf. Mishnah Ta‘aniot 2:7. he chooses? The verse says, “he may come as his heart desires … and serve”¹³⁶Deut. 18:6–7. Priests acting for themselves are exempt from the obligation to use the watch in charge of the week. The same argument is in Babli Baba Qama 109b, where verses are quoted in support of the assertion here that the hide and meat do not belong to the acting watch. In contrast, Sifry Deut. 168 restricts the right of the Cohen to participation in the priestly blessing any time he so desires.. If he was old or sick, he may give it to any watch he likes but the hide and meat are his. If he was impure or had a bodily defect, he must give it to the acting watch¹³⁷The old or sick in principle are able to sacrifice by themselves; the impure and disfigured are barred from entering the Temple. The latter cannot sacrifice and in this respect are not different in status from a non-Cohen., and the hide and meat are theirs. These mixed-up ones, how do you treat them? Comparing them to the old or sick, or to the impure or to those with a bodily defect. It seems reasonable to compare them to the impure or those having a bodily defect¹³⁸They could not possibly be accepted as acting priests in the Temple.; but the Mishnah compares them to the old or sick, since we have stated: “One cannot take his from him¹³⁹This is the language of Mishnah 8..”