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Masechet so far · Bekhorot 23 · בכורות כ״ג
The masechet so far, chapter by chapter
Masechet Bekhorot addresses the sanctity and laws of firstborn animals and humans, including their redemption, offerings, and exemptions. Through daf 23, the tractate covers the redemption of firstborn donkeys, rules for firstborn kosher livestock, and physical signs that determine whether an animal previously gave birth.
Chapter 1 – הלוקח עובר חמורו: Firstborn Donkey Sanctity and Redemption
A male firstborn donkey has sanctity and must be redeemed with a sheep or goat given to a priest, known as a kohen. Any ownership share held by a gentile entirely removes firstborn obligations from the animal. If an owner chooses not to redeem the firstborn donkey, he must break its neck and bury it.
- Partnership with a gentile exempts a donkey from firstborn status, and priests and Levites are also exempt.
- A firstborn donkey is redeemed with a male or female lamb, whether unblemished or blemished.
- If the owner does not redeem the donkey with a lamb, he breaks its neck from behind and buries it.
Chapter 2 – הלוקח עובר פרתו: Firstborn Kosher Animals and Doubtful Births
Firstborn kosher animals possess inherent sanctity and are given directly to the priest without redemption. Livestock investments guaranteed to a gentile remove firstborn sanctity from the offspring. Complex doubts regarding multiple births or caesarean deliveries are resolved using legal principles of monetary claims.
- A pre-blemished consecrated animal has only monetary sanctity, so its redemption permits shearing, working, and consuming its milk.
- Livestock held as a guaranteed investment for a gentile exempts the offspring from firstborn sanctity.
- When twin male lambs emerge simultaneously, Rabbi Akiva gives the leaner lamb to the priest due to monetary doubt.
- Neither a caesarean offspring nor the sibling following it holds firstborn sanctity, as neither properly opened the womb.
Chapter 3 – הלוקח בהמה: Signs of Prior Birth and Nursing Assumptions
When purchasing livestock from a gentile, an owner must know if the animal gave birth before to determine firstborn status, called bechor. An expelled uterine fluid or afterbirth serves as proof of a previous pregnancy, exempting future offspring. Animal nursing habits provide a reliable presumption that a nursing mother has already delivered offspring.
- A murky uterine discharge indicates a prior fetus, exempting future offspring from firstborn sanctity if confirmed by a shepherd.
- A miscarried mass exempts future births from firstborn status, but congealed tissue nullifies ritual impurity.
- Purchasing a nursing animal proves prior birth, because animals nurse only their biological offspring.