Leviticus 1:10 (ESV)
10 “If his gift for a burnt offering is from the flock, from the sheep or goats, he shall bring a male without blemish,
The requirement for the sacrificial animal to be perfect foreshadows the person of Jesus Christ, the One who is without sin. Peter uses the language of the Leviticus as he refers to Jesus as the Lamb without spot or blemish (1 Peter 1:19).
3 “If his offering is a burnt offering from the herd, he shall offer a male without blemish. He shall bring it to the entrance of the tent of meeting, that he may be accepted before the LORD.