Priestly Disqualifications and Offspring Slaughter in Halacha

The Gemara defines when bodily blemishes disqualify a priest, how marital transgressions affect sacred duties, and whether male animals are included in the slaughter restrictions of offspring.

Slaughtering a Father and Its Offspring

The Torah forbids slaughtering an animal and its offspring on the same day, known as אותו ואת בנו (itself and its offspring). The Mishnah states that this disqualifies an animal offering from the altar but has no human parallel in the Temple. The Gemara asks whether the prohibition applies when slaughtering a male animal alongside its offspring. A baraita cites a dispute: the first sage restricts the law to female animals, while חנניה (Ḥananya) extends it to male parents as well.

The Gemara leaves this question unresolved as a matter of doubt. Consequently, the Rambam rules that one may not slaughter a known father and its offspring on the same day. However, if one transgressed and slaughtered them, the slaughterer is not lashed because the liability remains in ספק (doubt). Maran in the Shulchan Arukh codifies this exact ruling. One must not slaughter a father and offspring together due to unresolved doubt, though no lashes are incurred.

ואם נודע ודאי שזה הוא אביו אין שוחטין שניהם ביום אחד ואם שחט אינו לוקה. שהדבר ספק

And if it is known with certainty that this is its father, we do not slaughter both on one day, and if he slaughtered, he does not receive lashes, as the matter is a doubt. (Shulchan Arukh, Yoreh De'ah 16:2)

Priests Married to Forbidden Women

The Mishnah teaches that a priest who married a forbidden woman, such as a divorcee, is disqualified from the altar. If discovered during service, a baraita allows him to vow to derive no benefit from her, finish the rite, and then divorce her. The Gemara questions why this vow is trusted, since a sage could later annul it. It concludes that the vow must be administered על דעת רבים (upon the discretion of the public), which prevents any sage from dissolving it.

The Rambam codifies that beit din (court) must administer this public vow before the priest may serve. If he performed service before vowing, the service itself is not retroactively profaned. While Temple offerings do not exist today, the Beit Yosef extends this rabbinic penalty to contemporary synagogue practices. Such a priest cannot recite the Priestly Blessing or read first from the Torah until he separates via a public vow.

כֹּהֵן שֶׁהָיָה נוֹשֵׂא נָשִׁים בַּעֲבֵרָה אֵינוֹ עוֹבֵד עַד שֶׁיַּדִּירוּהוּ בֵּית דִּין עַל דַּעַת רַבִּים

A priest who married women sinfully does not perform service until the court compels him to vow upon the discretion of the public. (Mishneh Torah, Admission into the Sanctuary 6:9)

Ambidexterity and Extra Digits

Physical anomalies disqualify a priest from officiating in the Sanctuary. The Mishnah states that having an extra digit containing a bone permanently invalidates a priest, even if surgically amputated. Furthermore, the Mishnah records a dispute regarding one who is שולט בשתי ידיו (ambidextrous). Rabbi Yehuda HaNasi disqualifies an ambidextrous priest, viewing the condition as right-arm weakness, whereas the Sages validate him.

The Rambam rules with the Sages: an ambidextrous priest is fit for Temple service, whereas a purely left-handed priest is disqualified. The Rambam also confirms that an extra finger with a bone permanently disqualifies a priest, even after surgical removal. Poskim apply the Gemara's discussion of left-handedness and dominant feet to contemporary laws of חליצה (chalitzah, ritual shoe removal). An ambidextrous man performs chalitzah with his right foot like all other men.

An ambidextrous priest remains qualified for sacred service, while male parentage creates a rabbinic doubt in slaughter restrictions and a public vow is mandatory to rectify priestly marital transgressions.

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