Revelation 4:6

and before the throne a glassy sea like crystal; and in the midst of the throne, and round about the throne, are four living creatures filled with eyes in front and in the rear.

Revelation 5:6

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

Revelation 15:2

And I saw as it were a sea of glass mingled with fire: and those who conquer from the beast, and from his image, and from 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 fell down before the throne on their faces, and worshiped God,

Revelation 14:3

and they are singing a new song before the throne, and in presence of the four living creatures, and the elders. And no one was able to learn the song except the hundred and forty-four thousand, who have 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 liveth unto the ages of the ages.

Revelation 19:4

And the twenty-four elders and the four living creatures fell down and worshiped God who sitteth upon the throne, saying Amen; Hallelujah!

Revelation 4:8-9

And the four living creatures having six wings, one opposite one of them; filled with eyes without and within; and they cease not day and night, saying; Holy, holy, holy, is the Lord God Omnipotent, who was, and who is, and who is the one coming.

Revelation 5:14-1

And the four living creatures continued to say, Amen. And the elders fell and worshiped.

Revelation 7:17

because the Lamb in the midst of the throne will shepherdize them, and guide them to the fountains of the waters of life; and God will wipe every tear out of their eyes.

Revelation 21:11

having the glory of God: and her light was like a stone most precious, as a crystalline, jasper stone;

Revelation 21:18

And the building of the wall was jasper: and the city pure gold, like transparent glass.

Revelation 21:21

The twelve gates are twelve pearls; each one of the gates was of one pearl. And the street of the city is pure gold, like transparent glass.

Revelation 22:1

And he shewed me a river of the water of life, clear as crystal, proceeding out from the throne of God and 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 conquer from the beast, and from his image, and from 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: and her light was like a stone most precious, as a crystalline, jasper stone;
Revelation 22:1
And he shewed me a river of the water of life, clear as crystal, proceeding out from the throne of God and the Lamb.

The midst

Revelation 5:6
And I saw, in the midst of the throne and the four living creatures, and in the midst of the elders, the Lamb standing as having been slain, having seven horns and seven eyes, which are the seven Spirits of God having been sent into all the earth.
Revelation 7:17
because the Lamb in the midst of the throne will shepherdize them, and guide them to the fountains of the waters of life; and God will wipe every tear out of their eyes.

Four beasts

Revelation 4:8
And the four living creatures having six wings, one opposite one of them; filled with eyes without and within; and they cease not day and night, saying; Holy, holy, holy, is the Lord God Omnipotent, who was, and who is, and who is the one coming.
Revelation 5:6
And I saw, in the midst of the throne and the four living creatures, and in the midst of the elders, the Lamb standing as having been slain, having seven horns and seven eyes, which are the seven Spirits of God having been 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 speaking, like a voice of thunder, Come.
Revelation 7:11
And all the angels stood round about the throne, and the elders, and the four living creatures, and fell down before the throne on their faces, and worshiped God,
Revelation 14:3
and they are singing a new song before the throne, and in presence of the four living creatures, and the elders. And no one was able to learn the song except the hundred and forty-four thousand, who have 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 liveth unto the ages of the ages.
Revelation 19:4
And the twenty-four elders and the four living creatures fell down and worshiped God who sitteth upon the throne, saying Amen; Hallelujah!

Full

Revelation 4:8
And the four living creatures having six wings, one opposite one of them; filled with eyes without and within; and they cease not day and night, saying; Holy, holy, holy, is the Lord God Omnipotent, who was, and who is, and who is the one coming.