What is the principal rhetorical force of fa-mā yukadhdhibuka baʿdu bi-d-dīn?

Supplementary Practice 26 — Comparative Rhetoric of Sūrat al-Qāriʿah and Sūrat al-Tīn

• Simply asking a city’s name
• Issuing an affirmative imperative
• Making the object of oath genitive
• Challenging any basis for denying recompense after the preceding evidence