Leviticus 22:20-21

²⁰They shall not bring to the Lord anything that has a blemish in it, for it shall not be acceptable for you.

²¹And whatever man shall offer a peace-offering to the Lord, discharging a vow, or in the way of free will offering, or an offering in your feasts, of the herds or of the sheep, it shall be without blemish for acceptance: there shall be no blemish in it.