In qifī qabla l-tafarruq, qifī is an imperative and qabla an adverbial expression annexed to al-tafarruq. Yā ẓaʿīnā is direct address to a woman.
Nukhbirki … wa-tukhbirīnā presents a mutual exchange. The alternation between a collective speaker and a feminine addressee turns public speech into a more personal conversation.