'Eternal' in the Bible

but whoever blasphemes against the Holy Spirit never has forgiveness, but is guilty of an eternal sin”—

As He was setting out on a journey, a man ran up to Him and knelt before Him, and asked Him, “Good Teacher, what shall I do to inherit eternal life?”

but that he will receive a hundred times as much now in the present age, houses and brothers and sisters and mothers and children and farms, along with persecutions; and in the age to come, eternal life.

And they went out and preached everywhere, while the Lord worked with them, and confirmed the word by the signs that followed.][And they promptly reported all these instructions to Peter and his companions. And after that, Jesus Himself sent out through them from east to west the sacred and imperishable proclamation of eternal salvation.]