Isaiah 6:2-6

2Above 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. 3And one cried unto another, and said, Holy, holy, holy, is Yhwh of Armies: the whole earth is full of his glory.12 4And the posts of the door moved at the voice of him that cried, and the house was filled with smoke.3

5Then 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, Yhwh of Armies.4 6Then 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:5