وَمَرَرْتُ بِمُسْلِمِينَ وَعِشْرِينَ رَجُلًا وَأُولِي مَالٍ.
Translation: And I passed by some Muslims, twenty men, and wealthy people.
First segment: «وَمَرَرْتُ بِمُسْلِمِينَ»
وَ: coordinating particle.
مَرَرْتُ: past-tense verb built on sukūn with the subject tāʾ; تُ is the subject pronoun.
بِ: preposition.
مُسْلِمِينَ: genitive noun governed by bāʾ, marked by yāʾ as a sound masculine plural.
Key: Accusative and genitive look the same here, but are identified by their governing elements.