Revelation 4:6 - And before the throne there was a sea of glass G5193 like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind.
Revelation 15:2 - And I saw as it were a sea of glass G5193 mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, G5193 having the harps of God.