Luke 18:3-8

3and there was a widow in that city; and she came oft unto him, saying, Avenge me of mine adversary.

4And he would not for a while: but afterward he said within himself, Though I fear not God, nor regard man;

5yet because this widow troubleth me, I will avenge her, lest she wear me out by her continual coming.

6And the Lord said, Hear what the unrighteous judge saith.

7And shall not God avenge his elect, which cry to him day and night, and he is longsuffering over them?

8I say unto you, that he will avenge them speedily. Howbeit when the Son of man cometh, shall he find faith on the earth?