وَعِشْرُونَ رَجُلًا
Translation: And twenty men.
وَ: conjunction.
عِشْرُونَ: coordinated with «مُسْلِمُونَ», thus nominative with wāw as a sound-masculine-plural analogue.
رَجُلًا: tamyīz (specification), accusative with fatḥa, singular and indefinite; it identifies what is counted.
Why? The numeral shares the subject's nominative case, while its specification remains accusative.
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Noun Case Classes: Type 6 — Sound Masculine Plural and Related Forms
وَعِشْرُونَ رَجُلًا
Translation: And twenty men.
وَ: conjunction.
عِشْرُونَ: coordinated with «مُسْلِمُونَ», thus nominative with wāw as a sound-masculine-plural analogue.
رَجُلًا: tamyīz (specification), accusative with fatḥa, singular and indefinite; it identifies what is counted.
Why? The numeral shares the subject's nominative case, while its specification remains accusative.