What is the grammatical role of ʿAblah in wa-taḥullu ʿAblah bi-l-Jawāʾ?

ʿAntarah ibn Shaddād: Ruins, Love for ʿAblah and Tribal Conflict (verses 1–11)

• Accusative object
• Genitive possessor
• Preposition
• Nominative subject of the verb