Talmud - Zevahim 79b זבחים ע״ט ב׳

§ The Gemara continues its discussion of cases involving a mixture of one substance in contact with the same type of substance, in which according to the opinion of Rabbi Yehuda in the mishna the prohibited substance is not nullified. The Sages taught a baraita (Tosefta, Teharot 5:3): In a case where a broken earthenware flask had absorbed the urine of a zav or a zava, whose urine is a primary source of ritual impurity, which imparts impurity to one who carries it, in such a case, if one poured water into this flask to clean it, after the first time and the second time one washed it, it remains ritually impure, but after the third time it is ritually pure, as the impure urine has been expelled from the flask.

The baraita continues: In what case is this statement said? It is said when one placed water into the flask. But if he did not place water into it, but instead placed the urine of a ritually pure person into it, even after the tenth time he places this urine into the flask it remains ritually impure, as one substance in contact with the same type of substance is not nullified. Rabbi Eliezer ben Ya’akov says: After the third time, even though he did not place water into it, but rather urine, it is ritually pure. The Gemara comments: Whom did you hear who says that a substance in contact with the same type of substance is not nullified? Rabbi Yehuda, and therefore he is the first tanna of this baraita.

And the Gemara raises a contradiction from another baraita (Tosefta, Teharot 4:11): With regard to flax that was woven by a menstruating woman, although it has absorbed the spittle of a menstruating woman, which imparts impurity by being carried, one who moves it remains ritually pure, as the spittle has dried. But if the flax was still moist, one who moves it is rendered impure due to the liquid of her mouth, i.e., the spittle of the menstruating woman. Rabbi Yehuda says: Even one who wets the flax with water is rendered impure due to the liquid of her mouth, and this halakha applies even if he wet the flax a great deal, several times, as the water does not nullify and expel the spittle. This apparently contradicts Rabbi Yehuda’s claim with regard to the broken flask that was washed with water three times.

Rav Pappa says: Spittle is different, as it is thoroughly absorbed and adheres to the flax, and therefore washing the flax with water does not nullify the spittle.

§ The mishna teaches: If blood fit for presentation was mixed with the blood of unfit offerings, the entire mixture shall be poured into the Temple courtyard drain, and similarly, if blood fit for presentation became mixed with blood of exudate, it shall be poured into the drain, whereas Rabbi Eliezer deems the mixture fit for presentation. The Gemara asks: With regard to what principle do the first tanna and Rabbi Eliezer disagree?

Rav Zevid says: They disagree with regard to the question of whether the Sages issue a rabbinic decree of this kind with regard to the Temple. As one Sage, the first tanna, holds that the Sages issue a rabbinic decree with regard to the Temple, and therefore one may not present this mixture of blood, lest one present a mixture that contains a majority of blood of unfit offerings or blood of exudate. And one Sage, Rabbi Eliezer, holds that the Sages do not issue a rabbinic decree with regard to the Temple, and consequently this mixture of blood is fit for presentation.

Rav Pappa says that there is a different explanation of the dispute: Everyone agrees that the Sages issue a rabbinic decree with regard to the Temple, and therefore in a case where blood fit for presentation was mixed with the blood of unfit offerings Rabbi Eliezer agrees that it should be poured into the Temple courtyard drain, and he deems the blood permitted only if it was mixed with blood of exudate.

Rav Pappa continues: And here they disagree with regard to the question of whether it is common for blood of exudate to be greater in quantity than blood of the soul, i.e., the blood that emerges immediately following the slaughter of the animal. One Sage, the first tanna, holds that this is a common occurrence, and therefore the Sages issued a decree concerning all mixtures of blood of exudate and blood of the soul. And one Sage, Rabbi Eliezer, holds that this is not a common occurrence, and therefore the Sages did not issue a decree concerning a mixture of this kind.

The Gemara comments: Granted, according to the opinion of Rav Pappa that Rabbi Eliezer’s lenient ruling applies only to a mixture with blood of exudate, but that he concedes to the first tanna that if blood fit for presentation was mixed with the blood of unfit offerings it is poured down the Temple courtyard drain, this explanation is consistent with that which the mishna teaches: If blood fit for presentation was mixed with the blood of unfit offerings, it shall be poured into the Temple courtyard drain; if blood fit for presentation was mixed with blood of exudate, it shall be poured into the drain. In other words, the fact that the mishna separates these two cases into different clauses makes sense, as Rabbi Eliezer’s ruling applies only to one case.

But according to the interpretation of Rav Zevid that Rabbi Eliezer disagrees with regard to both cases, let the mishna combine them and teach them together, as follows: If blood fit for presentation was mixed with the blood of unfit offerings or with blood of exudate, the entire mixture shall be poured into the drain running through the Temple courtyard, and Rabbi Eliezer deems the mixtures fit for presentation. The Gemara concludes: Indeed, the wording of the mishna poses a difficulty to the explanation of Rav Zevid.

MISHNA: If the blood of unblemished offerings was mixed with the blood of blemished animals unfit for sacrifice, the entire mixture shall be poured into the Temple courtyard drain. This is the halakha when the fit and unfit blood were mixed in one vessel. By contrast, if a cup of the blood of a blemished offering was intermingled with cups of blood fit for offering and it is unclear which blood is in the cup, Rabbi Eliezer says: Although it is prohibited to present all the blood due to the uncertainty, if it happened that a priest already sacrificed, i.e., presented, one cup, the blood in all the other cups shall be sacrificed, as the blood that was presented is assumed to have come from the unfit cup in the mixture. And the Rabbis say: Even if the blood in all the cups was sacrificed except for one of them, the remaining blood shall be poured into the Temple courtyard drain.

With regard to blood that is to be placed below the red line circumscribing the altar, e.g., blood of a burnt offering, a guilt offering, or a peace offering, that was mixed with blood that is to be placed above the red line, e.g., blood of a sin offering, Rabbi Eliezer says: The priest shall initially place the blood of the mixture above the red line for the sake of the sin offering, and I view the blood that was to be placed below that was in fact placed above as though it is water, and the priest shall again place blood from the mixture below. And the Rabbis say: It shall all be poured into the Temple courtyard drain. Even according to the Rabbis, if the priest did not consult the authorities and placed the blood above the red line, the offering is fit, and he should then place the remaining blood below the red line.

Traduction : The William Davidson digital edition of the Koren Noé Talmud, with commentary by Rabbi Adin Even-Israel Steinsaltz.

Zevachim 79b examines ritual impurity from a zav’s urine absorbed in earthenware, plus washing thresholds and Rabbi Yehuda’s view on non-nullification of like substances.