وَعِشْرِينَ رَجُلًا
Translation: And twenty men (as objects of seeing).
وَ: conjunction.
عِشْرِينَ: coordinated with the accusative «مُسْلِمِينَ», thus accusative with yāʾ.
رَجُلًا: accusative tamyīz clarifying what twenty counts.
Compare: «عِشْرُونَ» was nominative with the subject; here «عِشْرِينَ» shares the object's accusative case.
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Noun Case Classes: Type 6 — Sound Masculine Plural and Related Forms
وَعِشْرِينَ رَجُلًا
Translation: And twenty men (as objects of seeing).
وَ: conjunction.
عِشْرِينَ: coordinated with the accusative «مُسْلِمِينَ», thus accusative with yāʾ.
رَجُلًا: accusative tamyīz clarifying what twenty counts.
Compare: «عِشْرُونَ» was nominative with the subject; here «عِشْرِينَ» shares the object's accusative case.