Isaiah 6:6-7 Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar: And he laid it upon my mouth.
Psalm 104:4 Who maketh his angels spirits; his ministers a flaming fire.
Matthew 3:11 I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire.
Num. 31: 23 Every thing that may abide the fire, ye shall make it go through the fire, and it shall be clean.
I Cor. 2:4-5 And my speech and my preaching was not with enticing words of man's wisdom, but in demonstration of the Spirit and of power.