Luke 18:1-8New King James Version (NKJV)
The Parable of the Persistent Widow
18 Then He spoke a parable to them, that men always ought to pray and not lose heart, 2 saying: “There was in a certain city a judge who did not fear God nor regard man. 3 Now there was a widow in that city; and she came to him, saying, ‘Get justice for me from my adversary.’ 4 And he would not for a while; but afterward he said within himself, ‘Though I do not fear God nor regard man, 5 yet because this widow troubles me I will avenge her, lest by her continual coming she weary me.’”
6 Then the Lord said, “Hear what the unjust judge said. 7 And shall God not avenge His own elect who cry out day and night to Him, though He bears long with them? 8 I tell you that He will avenge them speedily. Nevertheless, when the Son of Man comes, will He really find faith on the earth?”