'Only begotten' in the Bible

And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.

No man has seen God at any time; the only begotten Son, who is in the bosom of the Father, he has declared him.

For God so loved the world, that he gave his only begotten Son, that whosoever believes in him should not perish, but have everlasting life.

He that believes on him is not condemned: but he that believes not is condemned already, because he has not believed in the name of the only begotten Son of God.