An interest in exhorting the faithful to persevere in prayer, confident that God will never treat them like a powerful patron who finds the demands of his clients burdensome, is also seen in the rabbinic tradition.
Samuel Lachs notes the following parallel:
She will wear me out Gr. hupopiaze me, lit., "she will give me a black eye." One suggestion to explain this difficult expression is that it is a translation of tashechir panai, "she will blacken my face," meaning she will embarrass me. (Rabbinic Commentary on the NT, 323)