John Gill Commentary Leviticus 7:21

"And when any one shall touch any unclean thing, the uncleanness of man, or an unclean beast, or any unclean abomination, and eat of the flesh of the sacrifice of peace-offerings, which pertain unto Jehovah, that soul shall be cut off from his people." — Leviticus 7:21 (ASV)

Moreover, the soul that shall touch any unclean [thing] ,
&c.] Person or thing, the dead body of a man, or the bone of a dead body, or a grave in which it was laid:

as the uncleanness of man ;
the issue that runs from a profluvious person:

or [any] unclean beast ;
that was so by the law ceremonial; see (Leviticus 11:4–8) :

or any abominable unclean thing ;
which the Targum of Jonathan interprets of every unclean reptile: see (Leviticus 11:20Leviticus 11:24Leviticus 11:29)

and eat of the flesh of the sacrifice of peace offerings, which
[pertain] unto the Lord, even that soul shall be cut off from his
people; (See Gill on Leviticus 7:20).