Revelation 4:6

And in front of the throne as it seemed, a glassy sea like crystal; and in the midst of the throne and encircling it are four Living Creatures, full of eyes before and behind.

Revelation 5:6

Then I beheld a Lamb standing as if slain in the midst of the throne and of the four Living Creatures, and in the midst of the Elders. He had seven horns and seven eyes (which are the seven Spirits of God, sent forth into all the earth).

Revelation 15:2

And I saw the semblance of a glassy sea, mingled with fire; and standing by this glassy sea, with harps of God, were those who came off conquerors from the beast and from his image and from the cipher of his name.

Revelation 7:11

And all the angels stood encircling the throne, and the Elders and the Living Creatures; and they fell on their faces before the throne, worshiping God,

Revelation 14:3

They were singing a new song before the throne, and before the four Living Creatures and the Elders; and none can learn that song, except the one hundred and forty and four thousand, who had been redeemed from the earth.

Revelation 15:7

And one of the four Living Creatures gave to the seven angels seven golden bowls, full of the wrath of God, who lives forever and ever.

Revelation 19:4

Then the four and twenty Elders and the four beasts fell down and worshiped God who sits on the throne, saying, "Amen, Hallelujah!"

Revelation 4:8-9

And the four Living Creatures, each one with six wings, are full of eyes round about and within; day and night they are chanting ceaselessly. "Holy, holy, holy is the Lord God, the Almighty. Who was, and who is, and who is to come."

Revelation 5:14-1

And the four Living Creatures kept saying, "Amen!" And the Elders fell down and worshiped.

Revelation 7:17

For the Lamb in the midst of the throne Will shepherd them, And will lead them to fountains of living water; And God will wipe away every tear from their eyes."

Revelation 21:11

It had the glory of God. Its light was like some precious stone, like jasper, clear as crystal;

Revelation 21:18

And its wall is made of jasper; but the city is of pure gold, like pure glass.

Revelation 21:21

And the twelve gates were twelve pearls; each gate of one pearl. And the broad street of the city was of pure gold, transparent like glass.

Revelation 22:1

And he showed me the river of the Water of Life, clear as crystal, Flowing out from 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 the semblance of a glassy sea, mingled with fire; and standing by this glassy sea, with harps of God, were those who came off conquerors from the beast and from his image and from the cipher of his name.

Crystal

Revelation 21:11
It had the glory of God. Its light was like some precious stone, like jasper, clear as crystal;
Revelation 22:1
And he showed me the river of the Water of Life, clear as crystal, Flowing out from the throne of God, and of the Lamb,

The midst

Revelation 5:6
Then I beheld a Lamb standing as if slain in the midst of the throne and of the four Living Creatures, and in the midst of the Elders. He had seven horns and seven eyes (which are the seven Spirits of God, sent forth into all the earth).
Revelation 7:17
For the Lamb in the midst of the throne Will shepherd them, And will lead them to fountains of living water; And God will wipe away every tear from their eyes."

Four beasts

Revelation 4:8
And the four Living Creatures, each one with six wings, are full of eyes round about and within; day and night they are chanting ceaselessly. "Holy, holy, holy is the Lord God, the Almighty. Who was, and who is, and who is to come."
Revelation 5:6
Then I beheld a Lamb standing as if slain in the midst of the throne and of the four Living Creatures, and in the midst of the Elders. He had 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 say, with a voice like thunder, "Come!"
Revelation 7:11
And all the angels stood encircling the throne, and the Elders and the Living Creatures; and they fell on their faces before the throne, worshiping God,
Revelation 14:3
They were singing a new song before the throne, and before the four Living Creatures and the Elders; and none can learn that song, except the one hundred and forty and four thousand, who had been redeemed from the earth.
Revelation 15:7
And one of the four Living Creatures gave to the seven angels seven golden bowls, full of the wrath of God, who lives forever and ever.
Revelation 19:4
Then the four and twenty Elders and the four beasts fell down and worshiped God who sits on the throne, saying, "Amen, Hallelujah!"

Full

Revelation 4:8
And the four Living Creatures, each one with six wings, are full of eyes round about and within; day and night they are chanting ceaselessly. "Holy, holy, holy is the Lord God, the Almighty. Who was, and who is, and who is to come."