«وَلَا أَتَظَلَّمُ حِينَ أُظْلَمُ»
I do not complain of injustice even when I am wronged.
Atazallamu is a first-person imperfect in form V, referring to complaining of wrongdoing. Uẓlamu is first-person passive imperfect: “I am wronged.” The shared root ẓ-l-m contrasts voicing a complaint with being the victim of harm.
This is highly emphatic self-description, expressing the speaker's ideal of forbearance. It does not prove that injustice is acceptable or that seeking one's rights is always improper.