Бамидбар 18:18 Ссылки в Мишне: Mishnah Bekhorot, Mishnah Zevachim & Mishnah Yevamot

Bet Shammai says: An Israelite must not be invited to share [a blemished first born] with a priest. But Bet Hillel permits this, even in the case of a non-Jew. If a first born has a blood attack, even if it is going to die, its blood may not be let, the words of Rabbi Judah. But the sages say: he may let its blood, as long as he does not make a blemish. And if he made a blemish, he must not slaughter it on account of this. Rabbi Shimon says: he may let blood, even though he makes a blemish.

The first-born animal, tithe and the pesah are sacrifices of lesser sanctity. They are slaughtered in any part of the Temple court, and their blood requires one sprinkling, provided that he applies it against the base [of the altar]. They differ in the [rules governing] their eating: The first-born animal is eaten by priests [only], the tithe is eaten by anyone and they can be eaten in any part of the city, prepared in any manner, during two days and one night. The pesah can be eaten only at night, only until midnight, and it can be eaten only by those registered for it, and it can be eaten only when roasted.

If the child of a priest’s wife was mixed-up with the child of her female slave, behold both may eat terumah and [together] they receive one share at the threshing-floor. They may not defile themselves for the dead nor may they marry any women whether these are eligible [for marriage with a priest] or ineligible. If when they grew up, the mixed-up children freed one another they may marry women who are eligible for marriage with a priest and they may not defile themselves for the dead. If they defiled themselves, they do not receive the penalty of forty lashes. They may not eat terumah, but if they did eat they need not pay compensation either for the principal or [the additional] fifth. They are not to receive a share at the threshing-floor, but they may sell [their own] terumah and the proceeds are theirs. They receive no share in the holy things of the temple, and no holy things are given to them but others do not take their holy things from them. They are exempt from [giving to any priest] the shoulder, the cheeks and the maw, while the firstling of either of them should remain in the pasture until it contracts a blemish. The restrictions relating to priests and the restrictions relating to Israelites are both imposed upon them.