Leviticus 22:18-20

18“Speak to Aaron and his sons and to all the Israelites and say to them, ‘Any man of the house of Israel or any stranger in Israel who presents his offering, whether to fulfill any of their vows or as any of their freewill (voluntary) offerings which they presented to the Lord as a burnt offering—

19so that you may be accepted—it must be a male without blemish from the cattle, the sheep, or the goats.

20You shall not offer anything which has a blemish, because it will not be accepted for you.