جَاءَنِي غُلَامَا زَيْدٍ
Translation: Zayd’s two servants came to me.
جَاءَ: past verb; نِ is the protective nūn and ي is the attached object pronoun.
غُلَامَا: nominative dual subject, marked by alif and serving as mudāf; its nūn drops in iḍāfah.
زَيْدٍ: genitive mudāf ilayh.
Ghulāmā is the subject, not the object; the object pronoun is already present in the verb.