Isaiah 6:1-8 (King James Version)
The Vision and Call of Isaiah
6In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. 2 Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly. 3 And one cried unto another, and said, Holy, holy, holy, is the Lord of hosts: the whole earth is full of his glory. 4 And the posts of the door  moved at the voice of him that cried, and the house was filled with smoke.
5 Then said I, Woe is me! for I am undone;  because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips: for mine eyes have seen the King, the Lord of hosts. 6 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: 7 And he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged. 8 Also I heard the voice of the Lord, saying, Whom shall I send, and who will go for us? Then said I, Here am I; send  me.
6:4 door: Heb. thresholds
6:5 undone: Heb. cut off
6:8 Here...: Heb. behold me