«فَلَمَّا رَأَيْتُ تَلَهُّبَ جَذْوَتِهِ وَتَأَلُّقَ جِلْوَتِهِ»
When I saw the flame of his gift and the brilliance of his manifestation.
Jadhwah evokes a burning ember or flame; jilwah suggests an appearance or outward display. The verbs and verbal nouns connect heat and brilliance while giving each its own effect.
Al-Ḥārith, impressed by the stranger’s eloquence, begins to study his face and identifying marks. The story now moves from admiration of an anonymous poet to recognition of a person.