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Masechet so far · Bekhorot 20 · בכורות כ׳
The masechet so far, chapter by chapter
Masechet Bekhorot details the sanctification and redemption of firstborn animals and humans. Through daf 20, the text covers the redemption of firstborn donkeys, the sanctity of kosher animal firstborns, and how to resolve doubts when purchasing animals from gentiles.
Chapter 1 – הלוקח עובר חמורו: Redeeming Firstborn Donkeys
This chapter addresses the obligation to redeem a firstborn male donkey with a sheep or a goat. Partnership with a gentile or priestly heritage exempts the owner from this requirement. If the owner refuses to redeem the donkey, its neck is broken.
- Gentile ownership or partnership exempts a donkey fetus from firstborn sanctity and redemption obligations.
- A firstborn donkey must be redeemed with a lamb or kid; otherwise, its neck is broken.
- When births result in doubtful firstborn status, the priest bears the burden of proof to claim the redemption animal.
Chapter 2 – הלוקח עובר פרתו: Sanctity of Kosher Livestock Firstborns
This chapter examines male firstborn kosher livestock, which possess inherent holiness from birth. Priests and Levites remain fully obligated in these kosher animal offerings. The text resolves complex situations involving pre-existing blemishes, caesarean births, and twin deliveries.
- Priests and Levites must consecrate kosher firstborns, although gentile partnership still removes the obligation.
- Animals consecrated with a permanent blemish hold only monetary value, so their offspring are obligated as firstborns.
- When twin male lambs emerge simultaneously, Rabbi Akiva rules the priest receives only the leaner lamb.
- Rabbi Akiva rules that neither a caesarean offspring nor the subsequent sibling attains firstborn holiness.
Chapter 3 – הלוקח בהמה: Purchasing Animals with Uncertain Birth History
This chapter evaluates animals bought from gentiles without proof of prior births. Rabbi Yishmael determines certainty based on the mother animal's age. Rabbi Akiva argues that early uterine discharges or afterbirths can exempt subsequent offspring even within the first year.
- Rabbi Yishmael establishes age thresholds, such as a goat in its first year, to determine firstborn status.
- Rabbi Akiva rules that a murky uterine discharge or afterbirth exempts subsequent offspring from firstborn status.
- The Rabbis disregard general mating majorities, leaving the pregnancy history of a bought goat in doubt.