'Reliable' in the Bible

Moreover, we possess the prophetic word as an altogether reliable thing. You do well if you pay attention to this as you would to a light shining in a murky place, until the day dawns and the morning star rises in your hearts.

And the one seated on the throne said: "Look! I am making all things new!" Then he said to me, "Write it down, because these words are reliable and true."

Then the angel said to me, "These words are reliable and true. The Lord, the God of the spirits of the prophets, has sent his angel to show his servants what must happen soon."