وَ«كِلَا» وَ«كِلْتَا» لِلْمُثَنَّى خَاصَّةً، نَحْوُ: «قَامَ الرَّجُلَانِ كِلَاهُمَا، وَقَامَتِ الْمَرْأَتَانِ كِلْتَاهُمَا».
Translation: Kilā and kiltā serve exclusively for two: both men stood, and both women stood.
Kilāhumā emphasizes a masculine dual; kiltāhumā emphasizes a feminine dual. The attached humā is the genitive complement in these emphasis forms.