'Witnesses' in the Bible

And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.

These witnesses are the two olive trees and the two lamp stands standing in the presence of the Lord of the earth.

These witnesses have authority to close the heavens in order to keep rain from falling while they are prophesying. They also have authority to turn bodies of water into blood and to strike the earth with any plague, as often as they desire.

Then the witnesses heard a loud voice from heaven calling to them, "Come up here!" So they went up to heaven in a cloud, and their enemies watched them.

Then I saw that the woman was drunk on the blood of the saints and on the blood of the witnesses to Jesus. When I saw her, I was greatly astonished.