جَاءَ غُلَامَا زَيْدٍ.
The two servants of Zayd came.
The dual loses its nūn when it becomes the first term of iḍāfah: ghulāmā Zaydin, not ghulāmāni Zaydin.
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Dual Nūn Drops in Iḍāfah
The Dual Noun: Inflection, Maqṣūr, Mamdūd and Iḍāfah
جَاءَ غُلَامَا زَيْدٍ.
The two servants of Zayd came.
The dual loses its nūn when it becomes the first term of iḍāfah: ghulāmā Zaydin, not ghulāmāni Zaydin.