Revelation 15:2

Then I saw what appeared to be a sea of glass mixed with fire; and, standing by this sea of glass, holding the harps of God, I saw those who had come victorious out of the conflict with the Beast and its image and the number that formed its name.

Revelation 4:6

and in front of the throne is what seemed to be a sea of glass, 'resembling crystal, while within the space before the throne and round the throne are four Creatures full of eyes' in front and behind.

Revelation 5:8

And, when he had taken the book, the four Creatures and the twenty-four Councillors prostrated themselves before the Lamb, each of them holding a harp and golden bowls full of incense. (These are the prayers of Christ's People.)

Revelation 12:11

Their victory was due to the Blood of the Lamb, and to the Message to which they bore their testimony. In their love of life they shrank not from death.

Revelation 21:18

The material of the wall of the City was jasper, and the City was built of pure gold, which shone like clear glass.

Matthew 3:11

I, indeed, baptize you with water to teach repentance; but He who is Coming after me is more powerful than I, and I am not fit even to carry his sandals. He will baptize you with the Holy Spirit and with fire.

1 Peter 1:7

that the genuineness of your faith--a thing far more precious than gold, which is perishable, yet has to be tested by fire--may win praise and glory and honour at the Appearing of Jesus Christ.

1 Peter 4:12

Dear friends, do not be astonished at the fiery trials that you are passing through, to test you, as though something strange were happening to you.

Revelation 11:11-12

After three days and a half 'the life-giving breath of God entered these men, and they stood up upon their feet,' and a great terror took possession of those who were watching them.

Revelation 13:14-5

and in consequence of the marvels which it was allowed to perform under the eyes of the Beast, it is able to deceive all who are living on the earth. It bids those who live on the earth to make a statue in honour of the Beast, who, despite the wound from the sword, yet lived.

Revelation 19:1-7

After this, I heard what seemed to be a great shout from a vast throng in Heaven, crying-- 'Hallelujah! To our God belong Salvation, and Glory, and Power,

Treasury of Scripture Knowledge

Summary

And I saw as it were a sea of glass 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, having the harps of God.

Bible References

A sea

Revelation 4:6
and in front of the throne is what seemed to be a sea of glass, 'resembling crystal, while within the space before the throne and round the throne are four Creatures full of eyes' in front and behind.
Revelation 21:18
The material of the wall of the City was jasper, and the City was built of pure gold, which shone like clear glass.

Mingled

Matthew 3:11
I, indeed, baptize you with water to teach repentance; but He who is Coming after me is more powerful than I, and I am not fit even to carry his sandals. He will baptize you with the Holy Spirit and with fire.
1 Peter 1:7
that the genuineness of your faith--a thing far more precious than gold, which is perishable, yet has to be tested by fire--may win praise and glory and honour at the Appearing of Jesus Christ.
1 Peter 4:12
Dear friends, do not be astonished at the fiery trials that you are passing through, to test you, as though something strange were happening to you.

That had

Revelation 11:11
After three days and a half 'the life-giving breath of God entered these men, and they stood up upon their feet,' and a great terror took possession of those who were watching them.
Revelation 12:11
Their victory was due to the Blood of the Lamb, and to the Message to which they bore their testimony. In their love of life they shrank not from death.
Revelation 13:14
and in consequence of the marvels which it was allowed to perform under the eyes of the Beast, it is able to deceive all who are living on the earth. It bids those who live on the earth to make a statue in honour of the Beast, who, despite the wound from the sword, yet lived.
Revelation 14:1
Then, in my vision, I saw the Lamb standing on Mount Zion. With him were a hundred and forty-four thousand men, with his name and the name of his Father written on their foreheads.

Having

Revelation 5:8
And, when he had taken the book, the four Creatures and the twenty-four Councillors prostrated themselves before the Lamb, each of them holding a harp and golden bowls full of incense. (These are the prayers of Christ's People.)
Revelation 14:2
And I heard a sound from Heaven, 'like the sound of many waters,' and like the sound of a loud peal of thunder; the sound that I heard was like the music of harpers playing on their harps.
Revelation 19:1
After this, I heard what seemed to be a great shout from a vast throng in Heaven, crying-- 'Hallelujah! To our God belong Salvation, and Glory, and Power,