The words in question would need to be the words of Revelation 21:5: “Behold, I am making all things new.” Those words in turn are God’s glorious summary of the vision John saw (Revelation 21:1–2) and the voice’s explanation (Revelation 21:3–4). That God would dwell with man and be their God is indeed something wonderfully new! They are words that may never be forgotten, and thus must be written down!
5 And he who was seated on the throne said, “Behold, I am making all things new.” Also he said, “Write this down, for these words are trustworthy and true.”