Reference

Leviticus 22:20

But whatsoever hath a blemish, that shall ye not offer: for it shall not be acceptable for you.
18

Speak unto Aaron, and to his sons, and unto all the children of Israel, and say unto them, Whatsoever he be of the house of Israel, or of the strangers in Israel, that will offer his oblation for all his vows, and for all his freewill offerings, which they will offer unto the Lord for a burnt offering;

19

Ye shall offer at your own will a male without blemish, of the beeves, of the sheep, or of the goats.

20

But whatsoever hath a blemish, that shall ye not offer: for it shall not be acceptable for you.

21

And whosoever offereth a sacrifice of peace offerings unto the Lord to accomplish his vow, or a freewill offering in beeves or sheep, it shall be perfect to be accepted; there shall be no blemish therein.

22

Blind, or broken, or maimed, or having a wen, or scurvy, or scabbed, ye shall not offer these unto the Lord, nor make an offering by fire of them upon the altar unto the Lord.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Levitical Dietary Law

This verse discusses offerings, not dietary consumption. The prohibition against blemishes applies to what is presented to God, not what is eaten by people, therefore it does not codify dietary laws.