Charles Ellicott Commentary Leviticus 22:20

"But whatsoever hath a blemish, that shall ye not offer: for it shall not be acceptable for you." — Leviticus 22:20 (ASV)

But whatsoever hath a blemish. —Better. whatever has, etc., without the “but,” which is not in the original, and is not needed. The general rule is here repeated as an introduction to the cases which are to be specified immediately. It will be seen that only quadrupeds are mentioned and that birds are not alluded to, because when people brought birds the Law did not require any distinction to be made between male and female, and during the second Temple no blemish disqualified a bird except the entire absence of a limb.