What is the role of kaʾannahā in the description of the force?

al-Ḥārith ibn Ḥillizah: Ḥujr, Royal Kinship and the Dhū al-Majāz Covenant (verses 56–67)

• A resemblance particle with its pronoun
• Plural imperative verb
• Active past-tense verb
• Negation particle