Revelation 16:16-18

Young's Literal Translation

¹⁶ and they did bring them together to the place that is called in Hebrew Armageddon.

¹⁷ And the seventh messenger did pour out his vial to the air, and there came forth a great voice from the sanctuary of the heaven, from the throne, saying, `It hath come!'

¹⁸ and there came voices, and thunders, and lightnings; and a great earthquake came, such as came not since men came upon the earth, so mighty an earthquake -- so great!