Exodus 12:5-6 Your lamb shall be without blemish, a male a year old. You may take it from the sheep or from the goats, and you shall keep it until the fourteenth day of this month, when the whole assembly of the congregation of Israel shall kill their lambs at twilight.
The lamb is without blemish or tamim in the Hebrew. The lamb is complete or sound per Strong’s Concordance.
Multiple people bear witness to the fact Jesus Christ is the Lamb of God. The first example is a quote from John the Baptist in the Book of John. The identification of Christ as the Lamb of God took place in the Jordan River at the baptism of Jesus.
John 1:29 The next day he saw Jesus coming toward him, and said, “Behold, the Lamb of God, who takes away the sin of the world!”
A day later, John the Baptist again identified Jesus as the Lamb of God.
John 1:36 and he looked at Jesus as he walked by and said, “Behold, the Lamb of God!”
While Philip was with the Ethiopian, he equated Jesus as the referenced lamb from the reading of Isaiah 53:7.
Acts 8:32 Now the passage of the Scripture that he was reading was this: “Like a sheep he was led to the slaughter and like a lamb before its shearer is silent, so he opens not his mouth.”
The Apostle Peter states the blood of Jesus is as a sinless lamb.
1 Peter 1:19 but with precious blood, as of a lamb unblemished and spotless, the blood of Christ.
In these four cases above, Jesus is referred to as an ἀμνός/amnos in the Greek. A lamb with innocence and sacrificial considerations is the idea per Strong’s Concordance.
In the book of Revelation, John refers to Jesus as a lamb or ἀρνίον/arnion. This is a small, little, or diminutive lamb. This type of person has the purest of intentions. HELPs Word Studies indicates the essence of innocence or virgin like intentions. Twenty-nine times (29) Christ is labeled as an arnion only in the book of Revelation. The context is the throne room of Heaven in the presence of the Father, Spirit, millions of witnesses including apostles, elders, believers, martyrs, creatures, and angels.
Revelation 5:12 saying with a loud voice, “Worthy is the Lamb who was slain, to receive power and wealth and wisdom and might and honor and glory and blessing!”
Revelation 14:1 Then I looked, and behold, on Mount Zion stood the Lamb, and with him 144,000 who had his name and his Father’s name written on their foreheads.
Revelation 17:14 They will make war on the Lamb, and the Lamb will conquer them, for he is Lord of lords and King of kings, and those with him are called and chosen and faithful.
Millions bear witness…
Jesus Christ is the sacrificial Lamb of God as foreshadowed by Moses in Exodus 12.
