Leviticus 22:1-8

Further Restrictions as to the priests-' use of holy things, i.e. objects sacrificed or vowed. Temporary uncleanness, touching a corpse (Numbers 5:2 *) or an unclean object, as distinct from bodily defects, prevents priests from eating these things, while it lasts. This rule applies to leprosy, which is also (Leviticus 14) temporary. Animals which have died naturally or been killed by other animals are not to be eaten at all by the priests (cf. on Leviticus 17:15, also Leviticus 7:24). The rule is found also in Ezekiel 44:31.