The mitzvah of Pidyon Petter Chamor (Hebrew: פדיון פטר חמור‎ – “Redemption of the firstborn donkey”), is a mitzvah where a firstborn (bechor) donkey is redeemed by gifting a lamb to the Kohen. The lamb is not required to be firstborn.

A pidyon ceremony performed in upstate New York

This mitzvah, is listed as חובת הגוף (obligation of the body) and thus mandatory for jews in all places -including outside the land of Israel.