وَأُولِي مَالٍ
Translation: And people of wealth (after the preposition).
وَ: conjunction.
أُولِي: coordinated with «مُسْلِمِينَ», genitive with yāʾ, and muḍāf.
مَالٍ: muḍāf ilayh, genitive with kasra.
Contrast: The same «أُولِي» was accusative in the previous sentence; here it is genitive owing to the shared preposition.