The masechet so far, chapter by chapter

Masechet Bekhorot addresses the sanctification, redemption, and slaughter of firstborn animals and humans, focusing on which animals attain sanctity and how blemishes affect their status. Having detailed exemptions, ownership doubts, and animal blemishes, the tractate currently examines physical defects that disqualify priests (kohanim) from performing the Temple service.

Chapter 1 – הלוקח עובר חמורו: Redemption of the Firstborn Donkey

A male firstborn donkey possesses sanctity and must be redeemed with a sheep or goat given to a priest (kohen). Gentile partnership or descent from non-donkey mothers exempts the offspring from sanctity. If the owner refuses to redeem the donkey, its neck is broken.

Gentile ownership, even in partial partnership, exempts a donkey fetus from firstborn sanctity.
A firstborn donkey is redeemed with a male or female lamb, whether unblemished or blemished.
If the owner refuses to redeem the firstborn donkey, he must break its neck and bury it.

Chapter 2 – הלוקח עובר פרתו: Firstborn Kosher Animals and Partnership Doubts

Male firstborns of kosher animals attain bodily sanctity and must be given to a priest. Gentile partnership or mortgage rights over the animal exempt the newborn from firstborn status. When births are mixed or uncertain, the claimant bears the burden of proof.

A gentile's right of seizure over guaranteed livestock exempts the offspring from firstborn sanctity.
If twin male lambs emerge, Rabbi Akiva gives the priest only the leaner animal due to doubt.
Offspring born by caesarean section do not attain firstborn sanctity because they did not open the womb.

Chapter 3 – הלוקח בהמה: Signs of Prior Birth and Wool

Buyers can determine if an animal previously calved based on signs like uterine discharge, afterbirth, or active nursing. Firstborn animals may not be shorn or worked. Plucked wool is strictly restricted unless it naturally remains part of the fleece.

A murky uterine discharge indicates a prior fetus and exempts subsequent births from firstborn sanctity.
A female animal nursing an offspring is legally presumed to have previously given birth.
Hair may be plucked from a firstborn's neck only to facilitate slaughter or inspect a blemish.

Chapter 4 – עד כמה: Holding Periods, Inspectors, and Suspects

Owners must tend firstborn sheep for thirty days and cattle for fifty days before delivery. Animal blemishes must be evaluated by recognized experts, who may only receive standard wages for lost time. Individuals suspected of violating religious laws face commercial boycotts and legal disqualifications.

Owners must raise firstborn sheep for thirty days and large cattle for fifty days before delivery.
Court-authorized expert judges are exempt from paying restitution for mistaken rulings that cause financial loss.
Anyone suspected of violating a specific religious prohibition may neither adjudicate nor testify regarding that matter.

Chapter 5 – כל פסולי המוקדשין: Slaughtering and Selling Blemished Sacrifices

Disqualified consecrated animals are sold publicly for the Temple treasury, whereas blemished firstborns are sold privately by weight estimation. Deliberately inflicting a blemish on a firstborn prohibits slaughtering it on that account. Testimony regarding how a blemish arose is subject to credibility rules and conflict-of-interest bans.

Blemished firstborns may only be sold privately by estimate, and Beit Hillel permit non-priests to eat them.
Deliberately inflicting a blemish prohibits slaughter until a separate, natural blemish subsequently develops on the animal.
Three ordinary synagogue attendees may permit an animal with obvious blemishes when no expert Sage is available.

Chapter 6 – על אלו מומין: Physical Blemishes Disqualifying Sacrificial Animals

Blemishes permitting slaughter outside the Temple must be exposed and permanent defects in cartilage, skin, or bone. Specific flaws in the ears, eyes, mouth, genitals, and legs render the animal permanently blemished. Hidden flaws, temporary blemishes, or certain congenital conditions do not allow slaughter outside the Temple.

Slaughtering outside the Temple requires exposed, permanent defects like split ears, cataracts, or broken limbs.
A tevallul (white thread blemish) occurs only when white tissue extends across the iris into the pupil.
Boils that are moist inside and out are temporary conditions and do not permit slaughter outside the Temple.

Chapter 7 – מומין אלו: Physical Blemishes Disqualifying Priests

All permanent and transient animal blemishes also disqualify priests (kohanim) from Temple service, along with human-specific deformities. Abnormal head shapes, misplaced or asymmetrical eyes, sunken noses, and limb irregularities disqualify a priest. Certain conditions only carry rabbinic bans due to appearance, while others do not disqualify animals.

Abnormal skull shapes, such as a pointed or turnip-like head, disqualify a priest from Temple service.
A flat nose that allows painting both eyes with a single brushstroke disqualifies a priest from service.
Mismatched limb sizes, extra fingers containing bone, or knocking ankles disqualify a priest from performing service.

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