The Widow Who Will Not Stop Asking for Justice
Jesus tells of a widow who repeatedly demands justice from an unjust judge. The judge finally acts for self-interested reasons; Jesus argues from lesser to greater that God will vindicate his chosen ones who cry to him.
Where this fits in the story: Scripture repeatedly portrays God as defender of widows and judge of unjust power. The parable encourages persistent prayer while disciples wait under apparent delay.
The final question—whether the Son of man will find faith on earth—turns persistence into an eschatological discipleship test.