And if there be any blemish therein,.... In the firstling, as if it be "lame or blind", or have any ill blemish: thou shall not sacrifice it unto the Lord thy God; blemishes in any beast made it unfit for sacrifices which were required; and so all peace offerings, vows, and freewill offerings, were to be free from any, Lev 22:19, such were not fit for an holy sacrifice or an holy feast.