'Prophesy' in the Bible

And a voice said to me, "You must prophesy yet further concerning peoples, nations, languages, and many kings."

And I will authorize My two witnesses to prophesy for 1,260 days, clothed in sackcloth.

They have power given to them to seal up the sky, so that no rain may fall so long as they continue to prophesy; and power over the waters to turn them into blood, and to smite the earth with various plagues whenever they choose to do so.