'Only Son' in the Bible

As He approached the gate of the town, look, there was being carried out a dead man, his mother's only son, and she was a widow! A considerable crowd of townspeople were with her.

So the Word became human and lived a little while among us, and we actually saw His glory, the glory of One who is an only Son from His Father, and He was full of spiritual blessing and truth.

No one has ever seen God; the only son, Deity Himself, who lies upon His Father's breast, has made him known.

"For God loved the world so much that He gave His Only Son, so that anyone who trusts in Him may never perish but have eternal life.

Whoever trusts in Him is never to come up for judgment, but whoever does not trust in Him has already received his sentence, because he has not trusted in the name of God's only Son.

By faith Abraham, when he was put to the test, offered Isaac as a sacrifice; that is, he who had received the promise was starting to offer as a sacrifice his only son,

This is the way God's love for us has been shown, namely, God has sent His only Son into the world that we through Him might have life.