'Genuine' in the Bible

Then the angel said to me, “Write, ‘Blessed are those who are invited to the marriage supper of the Lamb.’” And he said to me [further], “These are the true and exact words of God.”

And He who sits on the throne said, “Behold, I am making all things new.” Also He said, “Write, for these words are faithful and true [they are accurate, incorruptible, and trustworthy].”

Then he said to me, “These words are faithful and true.” And the Lord, the God of the spirits of the prophets, has sent His angel [as a representative] to show His bond-servants the things that must soon take place.