Leviticus 22:19-21

¹⁹your free-will-offerings shall be males without blemish of the herds, or of the sheep, or of the goats.

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

²¹And whatsoever 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.