2 Thessalonians 1:8

awarding vengeance to those who know not God, and to those who obey not the Gospel of our Lord Jesus;

Hebrews 12:29

for, verily, our God is a consuming fire.

Revelation 1:14-16

And His head and hair were white as white wool, as snow; and His eyes were as a flame of fire;

Treasury of Scripture Knowledge

Summary

And I saw as the colour of amber, as the appearance of fire round about within it, from the appearance of his loins even upward, and from the appearance of his loins even downward, I saw as it were the appearance of fire, and it had brightness round about.

Bible References

The appearance of fire

2 Thessalonians 1:8
awarding vengeance to those who know not God, and to those who obey not the Gospel of our Lord Jesus;
Hebrews 12:29
for, verily, our God is a consuming fire.
Revelation 1:14
And His head and hair were white as white wool, as snow; and His eyes were as a flame of fire;