Isaiah 6:4 WBT

²  Above it stood seraphim: each one had six wings; with two he covered his face, and with two he covered his feet, and with two he flew.

³  And one cried to 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 my eyes have seen the King, the LORD of hosts.

⁶  Then one of the seraphim flew to me, having a live coal in his hand, [which] he had taken with the tongs from off the altar: