John 1:36

when he saw Jesus passing by, and said, "Look! that is the Lamb of God!"

John 1:29

The next day John saw Jesus coming towards him and exclaimed, "Look, that is the Lamb of God who is to take away the sin of the world!

Hebrews 12:2

simply fixing our gaze upon Jesus, our Prince Leader in the faith, who will also award us the prize. He, for the sake of the joy which lay before Him, patiently endured the cross, looking with contempt upon its shame, and afterwards seated Himself-- where He still sits--at the right hand of the throne of God.

1 Peter 1:19-20

but with the precious blood of Christ--as of an unblemished and spotless lamb.

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
The next day John saw Jesus coming towards him and exclaimed, "Look, that is the Lamb of God who is to take away the sin of the world!
Hebrews 12:2
simply fixing our gaze upon Jesus, our Prince Leader in the faith, who will also award us the prize. He, for the sake of the joy which lay before Him, patiently endured the cross, looking with contempt upon its shame, and afterwards seated Himself-- where He still sits--at the right hand of the throne of God.
1 Peter 1:19
but with the precious blood of Christ--as of an unblemished and spotless lamb.