جَاءَتْنِي مُسْلِمَاتٌ.
Translation: Muslim women came to me.
Grammatical analysis
جَاءَتْ: past-tense verb; the final تْ marks feminine gender.
نِي: ن is the protective nūn, and ي is the first-person object pronoun.
مُسْلِمَاتٌ: subject (fāʿil), so it is nominative with ḍamma.
The key point: the subject takes مُسْلِمَاتٌ, not مُسْلِمَاتٍ.