Isaiah 6:7

4 And the posts of the thresholds are moved by the voice of him who is calling, and the house is full of smoke.

5 And I say, `Wo to me, for I have been silent, For a man -- unclean of lips [am] I, And in midst of a people unclean of lips I am dwelling, Because the King, Jehovah of Hosts, have my eyes seen.`

6 And flee unto me doth one of the seraphs, and in his hand a burning coal, (with tongs he hath taken [it] from off the altar,)

7 and he striketh against my mouth, and saith: `Lo, this hath stricken against thy lips, And turned aside is thine iniquity, And thy sin is covered.`

8 And I hear the voice of the Lord, saying: `Whom do I send? and who doth go for Us?` And I say, `Here [am] I, send me.`

9 And He saith, `Go, and thou hast said to this people, Hear ye -- to hear, and ye do not understand, And see ye -- to see, and ye do not know.

10 Declare fat the heart of this people, And its ears declare heavy, And its eyes declare dazzled, Lest it see with its eyes, And with its ears hear, and its heart consider, And it hath turned back, and hath health.`