John 1:36

He looked at Jesus as he passed and exclaimed: "There is the Lamb of God!"

John 1:29

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

Hebrews 12:2

our eyes fixed upon Jesus, the Leader and perfect Example of our faith, who, for the joy that lay before him, endured the cross, heedless of its shame, and now 'has taken his seat at the right hand' of the throne of God.

1 Peter 1:19-20

but by precious blood, as it were of a lamb, unblemished and spotless, the Blood of Christ.

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: "Here is the Lamb of God, who is to take away the sin of the world!
Hebrews 12:2
our eyes fixed upon Jesus, the Leader and perfect Example of our faith, who, for the joy that lay before him, endured the cross, heedless of its shame, and now 'has taken his seat at the right hand' of the throne of God.
1 Peter 1:19
but by precious blood, as it were of a lamb, unblemished and spotless, the Blood of Christ.