وَأُولُو مَالٍ
Translation: And people possessing wealth.
وَ: conjunction.
أُولُو: coordinated with «مُسْلِمُونَ», nominative with wāw, a form annexed to the sound masculine plural category; also muḍāf.
مَالٍ: muḍāf ilayh, genitive with kasra.
Important: «أُولُو» does not have a detachable plural nūn. Wāw/yāʾ mark its case form.