Leviticus 7:21-23

New Revised Standard Version, Anglicised Catholic Edition

²¹ When any one of you touches any unclean thing—human uncleanness or an unclean animal or any unclean creature—and then eats flesh from the Lord’s sacrifice of well-being, you shall be cut off from your kin.

²² The Lord spoke to Moses, saying: ²³ Speak to the people of Israel, saying: You shall eat no fat of ox or sheep or goat.