Babylonian Talmud: Bekhorot 5b | ||
Torah: Exodus 13:13 and Exodus 34:20 | ||
The Petter Chamor (Hebrew: פטר חמור) or Redemption of the firstborn donkey, is a mitzvah in Judaism in which a male firstborn (bechor) donkey is redeemed by the owner of the donkey giving a lamb or kid to a Kohen. The lamb is not required to be firstborn.
The mitzvah, albeit rare in modern times, is listed as an "obligation of the body" and thus mandatory for diasporic jewry.
References
Petter Chamor Wikipedia(Text) CC BY-SA