'Only begotten' in the Bible

Your high feasts will I turn to sorrow, and your songs to mourning: I will bring sackcloth upon all backs, and baldness on every head. Yea, such a mourning will I send them, as is made upon an only begotten son, and they shall have a miserable end.

Moreover, upon the house of David and upon the citizens of Jerusalem, will I pour out the spirit of grace and prayer, so that they shall look upon me, whom they have pierced: and they shall beweep him, as men mourn for their only begotten son: Yea, and be sorry for him, as men are sorry for their first child

And the word was made flesh, and dwelt among us, and we saw the glory of it, as the glory of the only begotten son of the father, which word was full of grace, and verity.

No man hath seen God at any time. The only begotten son, which is in the father's bosom, hath declared him.

By faith Abraham offered up Isaac, when he was tempted, and he offered him being his only begotten son, which had received the promises:

Herein appeared the love of God to us ward, because that God sent his only begotten son into the world, that we should live through him.