جَاءَ أُولُو مَالٍ.
Translation: People of means arrived.
جَاءَ: past-tense verb.
أُولُو: nominative subject with wāw, also muḍāf.
مَالٍ: muḍāf ilayh, genitive with kasra.
Important: «أُولُو» does not itself have a nūn; do not treat it as a regular nūn-ending sound masculine plural.