Revelation 6:9 - And when he had opened the fifth G3991 seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:
Revelation 9:1 - And the fifth G3991 angel sounded, and I saw a star fall from heaven unto the earth: and to him was given the key of the bottomless pit.
Revelation 16:10 - And the fifth G3991 angel poured out his vial upon the seat of the beast; and his kingdom was full of darkness; and they gnawed their tongues for pain,
Revelation 21:20 - The fifth, G3991 sardonyx; the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst.