Adam Clarke on Luke 18:3

Avenge me of mine adversary - The original, εκδικησον με απο του αντιδικου μου, had better be translated, Do me justice against, or vindicate me from, my adversary. If the woman had come to get revenge, as our common translation intimates, I think our blessed Lord would never have permitted her to have the honor of a place in the sacred records. She desired to have justice, and that only; and by her importunity she got that which the unrighteous judge had no inclination to give, but merely for his own ease.