يَا مَظْلُومُ
O wronged person!
In a rhetorical setting, the purpose need not be simply to obtain the victim's attention. The utterance can be shaped to arouse others to support and assist that person. This intended stimulation is called ighrāʾ.
For instance, in front of bystanders the cry may implicitly urge help. The grammatically addressed person and the people whose behavior is intended to change need not be the same.