The 86th mitzvah is that we are commanded to redeem sanctified animals that develop a blemish, whereupon they become like regular animals and may be slaughtered and eaten.
The source of this commandment is G‑d's statement1 (exalted be He), "You may only slaughter animals to satisfy your own wants, so that you will be able to eat the meat that G‑d gives you as His blessing."
The Sifri says, "The verse, 'You may only slaughter animals to satisfy your own wants,' speaks of sanctified animals that have become invalid and were subsequently redeemed."
The details of this mitzvah of redeeming sanctified animals are explained in tractates Bechoros2 and Temurah,3 and a number of places in Chullin,4 Erachim,5 and Me'ilah.6
