Revelation 4:6

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

Revelation 5:6

And I saw, in the midst of the throne, and of the four living creatures, and in the midst of the elders, a Lamb standing, like one that had been slain, having seven horns and seven eyes, which are the seven spirits of God that are sent into all the earth.

Revelation 15:2

And I saw, as it were, a sea of glass mingled with fire, and those who had obtained the victory over the beast, and over his image, and over the number of his name, standing on the sea of glass, 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 on their faces before the throne, and worshiped God,

Revelation 14:3

And they sung a new song before the throne, and before the four living creatures, and the elders: and no one was able to learn the song, but the hundred and forty-four thousand that had been redeemed from the earth.

Revelation 15:7

And one of the four living creatures gave to the seven angels seven golden cups full of the wrath of God, who lives from age to age.

Revelation 19:4

And the twenty-four elders, and the four living creatures, fell down, and worshiped God that sits upon the throne, saying: Amen, Alleluia.

Revelation 4:8-9

And the four living creatures had each of them six wings about him; and they are full of eyes within; and they have no rest day and night, saying, Holy, holy, holy is the Lord God, the Almighty, who was, and is, and is to come.

Revelation 5:14-1

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

Revelation 7:17

For the Lamb that is in the midst of the throne will be their shepherd, and will lead them to living fountains of water: and God will wipe away every tear from their eyes.

Revelation 21:11

having the glory of God: that which gave it light was like a most costly stone, like jasper-stone, brilliant as crystal.

Revelation 21:18

And the wall of it was built of jasper; and the city was pure gold, like clear glass.

Revelation 21:21

And the twelve gates were twelve pearls; every gate was of one pearl: and the street of the city was pure gold, like clear glass.

Revelation 22:1

And he showed me a river of water of life, clear as crystal, coming 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, as it were, a sea of glass mingled with fire, and those who had obtained the victory over the beast, and over his image, and over the number of his name, standing on the sea of glass, having the harps of God.

Crystal

Revelation 21:11
having the glory of God: that which gave it light was like a most costly stone, like jasper-stone, brilliant as crystal.
Revelation 22:1
And he showed me a river of water of life, clear as crystal, coming out from the throne of God and of the Lamb.

The midst

Revelation 5:6
And I saw, in the midst of the throne, and of the four living creatures, and in the midst of the elders, a Lamb standing, like one that had been slain, having seven horns and seven eyes, which are the seven spirits of God that are sent into all the earth.
Revelation 7:17
For the Lamb that is in the midst of the throne will be their shepherd, and will lead them to living fountains of water: and God will wipe away every tear from their eyes.

Four beasts

Revelation 4:8
And the four living creatures had each of them six wings about him; and they are full of eyes within; and they have no rest day and night, saying, Holy, holy, holy is the Lord God, the Almighty, who was, and is, and is to come.
Revelation 5:6
And I saw, in the midst of the throne, and of the four living creatures, and in the midst of the elders, a Lamb standing, like one that had been slain, having seven horns and seven eyes, which are the seven spirits of God that are sent into all the earth.
Revelation 6:1
And I saw when the Lamb opened the first of the seven seals, and I heard one of the four living creatures saying, with a voice like 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 on their faces before the throne, and worshiped God,
Revelation 14:3
And they sung a new song before the throne, and before the four living creatures, and the elders: and no one was able to learn the song, but the hundred and forty-four thousand that had been redeemed from the earth.
Revelation 15:7
And one of the four living creatures gave to the seven angels seven golden cups full of the wrath of God, who lives from age to age.
Revelation 19:4
And the twenty-four elders, and the four living creatures, fell down, and worshiped God that sits upon the throne, saying: Amen, Alleluia.

Full

Revelation 4:8
And the four living creatures had each of them six wings about him; and they are full of eyes within; and they have no rest day and night, saying, Holy, holy, holy is the Lord God, the Almighty, who was, and is, and is to come.