وَإِنْ كَانَ آخِرُهُ وَاوًا مَضْمُومًا مَا قَبْلَهَا، قَلَبْتَهَا يَاءً، وَعَمِلْتَ كَمَا عَمِلْتَ الْآنَ، تَقُولُ: «جَاءَنِي مُسْلِمِيَّ».
Translation: If the noun ends in wāw preceded by ḍammah, turn that wāw into yāʾ and apply the preceding assimilation rule, as in “jāʾanī muslimiyya” — my Muslim men came to me.
This refers to the sound masculine plural ending, unlike the lexical wāw in dalw.