نَارُ اللَّهِ الْمُوقَدَةُ
The kindled Fire of Allah. (الهمزة: 6)
Nāru llāhi l-mūqadah directly clarifies the earlier question about al-Ḥuṭamah. The genitive construction gives solemn weight to the attribution, and al-mūqadah adds the image of kindling. An understood subject may be supplied in one grammatical account of the short explanatory expression.
The decisive rhetorical point is the direct answer after the question. It resolves the suspense rather than starting an unrelated sequence of events requiring a separate conjunction.