Which parsing best fits ashtātan and li-yuraw in 99:6?

Supplementary Practice 25 — Comparative Rhetoric of Sūrat az-Zalzalah and Sūrat al-ʿĀdiyāt

• Ashtātan is subject; the lām is an oath; the verb is imperative
• Ashtātan is genitive; the lām negates; the verb is active
• Ashtātan is the predicate of inna; lām is initial; the verb is perfect
• Ashtātan is circumstantial; the lām indicates purpose; the verb is passive