John 1:36

And when he saw Jesus walking by, he said, "Look, [there is] the Lamb of God!"

John 1:29

On the next day John [the Immerser] saw Jesus approaching him and said, "Look, [there is] the Lamb of God; He [will] take away the sin of the people of the world.

Hebrews 12:2

We should fix our eyes on Jesus, the pioneer and completer of the [or, "our"] faith. [Note: Jesus is here pictured as the one who completely fulfills the life of faith, or who provides us with the ability to live such a life]. [And] because He could look forward to joy, He endured the cross, despising its shame, and has sat down at the right side of God's throne.

1 Peter 1:19-20

but with [the] precious blood of Christ, who represents an unblemished lamb, without defect.

Treasury of Scripture Knowledge

Summary

And looking upon Jesus as he walked, he saith, Behold the Lamb of God!

Bible References

Behold

John 1:29
On the next day John [the Immerser] saw Jesus approaching him and said, "Look, [there is] the Lamb of God; He [will] take away the sin of the people of the world.
Hebrews 12:2
We should fix our eyes on Jesus, the pioneer and completer of the [or, "our"] faith. [Note: Jesus is here pictured as the one who completely fulfills the life of faith, or who provides us with the ability to live such a life]. [And] because He could look forward to joy, He endured the cross, despising its shame, and has sat down at the right side of God's throne.
1 Peter 1:19
but with [the] precious blood of Christ, who represents an unblemished lamb, without defect.