Luke
18:1-8 New 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?”