'Behold the Lamb' in the Bible

The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.

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

And I looked, and behold the Lamb was standing upon Mount Zion, and with him one hundred and forty-four thousand who had the name of his Father written on their foreheads.