كَالْإِغْرَاءِ فِي قَوْلِكَ لِمَنْ أَقْبَلَ عَلَيْكَ يَتَظَلَّمُ: يَا مَظْلُومُ
For example, “O wronged one!” addressed to someone already approaching you with a grievance.
Ighrāʾ means inciting or encouraging. The complainant has already come forward; a new attempt to obtain attention is unnecessary. The call “yā maẓlūm” is designed to encourage the person to expand upon the injustice and complaint.
The specific description “wronged person” matters: it foregrounds the addressee’s grievance. Replacing it with a neutral “O man” would change the rhetorical effect even though the vocative grammar remains similar.