وَأُولِي مَالٍ
Translation: And people of wealth (as objects).
وَ: conjunction.
أُولِي: coordinated with «مُسْلِمِينَ», accusative with yāʾ, and muḍāf.
مَالٍ: muḍāf ilayh, genitive with kasra.
Why? The coordinated item follows the object of «رَأَيْتُ», so the proper form is «أُولِي» rather than «أُولُو».
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Noun Case Classes: Type 6 — Sound Masculine Plural and Related Forms
وَأُولِي مَالٍ
Translation: And people of wealth (as objects).
وَ: conjunction.
أُولِي: coordinated with «مُسْلِمِينَ», accusative with yāʾ, and muḍāf.
مَالٍ: muḍāf ilayh, genitive with kasra.
Why? The coordinated item follows the object of «رَأَيْتُ», so the proper form is «أُولِي» rather than «أُولُو».