Revelation 4:6

And before the throne is a sea as of glass, like crystal; and in the midst of the throne and round about the throne four living creatures, full of eyes before and behind.

Revelation 5:6

And I beheld in the midst of the throne and of the four living creatures, and in the midst of the elders, a Lamb standing as if he had been slain, having seven horns and seven eyes, which are the seven Spirits of God, sent forth into all the earth.

Revelation 15:2

And I saw as it were a sea of glass mingled with fire, and them that gained the victory over the wild beast, and over his image, and over the number of his name, standing at the sea of glass, and having the harps of God.

Revelation 7:11

And all the angels stood round about the throne and the elders and the four living creatures; and they fell before the throne on their faces, and worshipped God saying, Amen:

Revelation 14:3

And they sing a new song before the throne, and before the four living creatures and the elders: and none could learn the song but the hundred forty-four thousand, who were redeemed from the earth.

Revelation 15:7

And one of the four living creatures gave the seven angels seven golden phials full of the wrath of God, who liveth for ever.

Revelation 19:4

And the four and twenty elders and the four living creatures fell down, and worshiped God that sat on the throne, saying, Amen, Hallelujah.

Revelation 4:8-9

And the four living creatures had each of them six wings; round about and within they are full of eyes: and they rest not day and night, saying, Holy, holy, holy is the Lord God, the Almighty, who was, and who is, and who cometh.

Revelation 5:14-1

And the four living creatures said Amen: and the elders fell down and worshiped.

Revelation 7:17

For the Lamb who is in the midst of the throne will feed them, and will lead them to living fountains of water: and God will wipe away all tears from their eyes.

Revelation 21:11

Having the glory of God: her window was like the most precious stone, like a jasper stone,

Revelation 21:18

And the building of the wall thereof was jasper, and the city was of pure gold, like clear glass.

Revelation 21:21

And the twelve gates were twelve pearls, each of the gates was of one pearl: and the street of the city was pure gold, transparent as glass.

Revelation 22:1

And he shewed me a river of the water of life clear as crystal, proceeding out of the throne of God and of the Lamb.

Treasury of Scripture Knowledge

Summary

And before the throne there was a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, were four beasts full of eyes before and behind.

Bible References

A sea

Revelation 15:2
And I saw as it were a sea of glass mingled with fire, and them that gained the victory over the wild beast, and over his image, and over the number of his name, standing at the sea of glass, and having the harps of God.

Crystal

Revelation 21:11
Having the glory of God: her window was like the most precious stone, like a jasper stone,
Revelation 22:1
And he shewed me a river of the water of life clear as crystal, proceeding out of the throne of God and of the Lamb.

The midst

Revelation 5:6
And I beheld in the midst of the throne and of the four living creatures, and in the midst of the elders, a Lamb standing as if he had been slain, having seven horns and seven eyes, which are the seven Spirits of God, sent forth into all the earth.
Revelation 7:17
For the Lamb who is in the midst of the throne will feed them, and will lead them to living fountains of water: and God will wipe away all tears from their eyes.

Four beasts

Revelation 4:8
And the four living creatures had each of them six wings; round about and within they are full of eyes: and they rest not day and night, saying, Holy, holy, holy is the Lord God, the Almighty, who was, and who is, and who cometh.
Revelation 5:6
And I beheld in the midst of the throne and of the four living creatures, and in the midst of the elders, a Lamb standing as if he had been slain, having seven horns and seven eyes, which are the seven Spirits of God, sent forth into all the earth.
Revelation 6:1
And I saw when the Lamb opened one of the seven seals, and I heard one of the four living creatures saying as the voice of thunder, Come and see.
Revelation 7:11
And all the angels stood round about the throne and the elders and the four living creatures; and they fell before the throne on their faces, and worshipped God saying, Amen:
Revelation 14:3
And they sing a new song before the throne, and before the four living creatures and the elders: and none could learn the song but the hundred forty-four thousand, who were redeemed from the earth.
Revelation 15:7
And one of the four living creatures gave the seven angels seven golden phials full of the wrath of God, who liveth for ever.
Revelation 19:4
And the four and twenty elders and the four living creatures fell down, and worshiped God that sat on the throne, saying, Amen, Hallelujah.

Full

Revelation 4:8
And the four living creatures had each of them six wings; round about and within they are full of eyes: and they rest not day and night, saying, Holy, holy, holy is the Lord God, the Almighty, who was, and who is, and who cometh.