Isaiah 6

6:1 In the year that King Uzziah died I saw the Lord sitting upon a throne, high and lifted up; and the train of his robe filled the temple. 2 Above him stood the seraphim. Each had six wings: with two he covered his face, and with two he covered his feet, and with two he flew. 3 And one called to another and said:

“Holy, holy, holy is the Lord of hosts;
the whole earth is full of his glory!”

4 And the foundations of the thresholds shook at the voice of him who called, and the house was filled with smoke. 5 And I said: “Woe is me! For I am lost; for 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 in his hand a burning coal that he had taken with tongs from the altar. 7 And he touched my mouth and said: “Behold, this has touched your lips; your guilt is taken away, and your sin atoned for.”

8 And I heard the voice of the Lord saying, “Whom shall I send, and who will go for us?” Then I said, “Here am I! Send me.” 9 And he said, “Go, and say to this people:

“‘Keep on hearing, but do not understand;
  keep on seeing, but do not perceive.’
10 Make the heart of this people dull,
  and their ears heavy,
  and blind their eyes;
lest they see with their eyes,
  and hear with their ears,
and understand with their hearts,
  and turn and be healed.”
11 Then I said, “How long, O Lord?”
And he said:
“Until cities lie waste
  without inhabitant,
and houses without people,
  and the land is a desolate waste,
12 and the Lord removes people far away,
  and the forsaken places are many in the midst of the land.
13 And though a tenth remain in it,
  it will be burned again,
like a terebinth or an oak,
  whose stump remains
  when it is felled.”
The holy seed is its stump.