Which account of illā ibtighāʾa wajhi rabbihi is academically careful?

Supplementary Practice 27 — Comparative Rhetoric of Sūrat al-Shams and Sūrat al-Layl

• It is accusative, with recognized discontinuous-exception and purposive analyses
• It is only an undisputed nominative subject
• It is a second-person imperative
• Illā always converts a negative verb into a past one