Then one of the seraphim flew to me, having in his hand
a live coal which he had taken with the tongs from the altar.
And he touched my mouth with it, and said:
โBehold, this has touched your lips;
Your iniquity is taken away,
And your sin purged.โ
Also I heard the voice of the Lord, saying:
โWhom shall I send,
And who will go for Us?โ
Then I said, โHere am I! Send me.โ
Isaiah 6:6-8