Musriʿan is accusative ḥāl, not direct object; the verb jāʾa remains intransitive in this example.
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Direct Object versus Circumstantial Ḥāl
Intransitive and Transitive Verbs: One, Two, Three Objects
Musriʿan is accusative ḥāl, not direct object; the verb jāʾa remains intransitive in this example.