'Flame' in the Bible

his head and hair white like white wool, as snow; and his eyes as a flame of fire;

And to the angel of the assembly in Thyatira write: These things says the Son of God, he that has his eyes as a flame of fire, and his feet are like fine brass:

And his eyes are a flame of fire, and upon his head many diadems, having a name written which no one knows but himself;