ירמיהו, פרק מ״ט, פסוק כ״ז

A devastating fire from above marks the looming ruin of Damascus. This total destruction is destined to strike the city as an absolute decree of doom directly from God [מצודת דוד]. The coming ruin is pictured as a massive, consuming blaze that will ignite and burn through the area [מצודת ציון, רד״ק].

The flames are aimed specifically at the domain of Ben-hadad, the king of Aram who ruled over Damascus for many years [מצודת דוד, ביאור שטיינזלץ]. Identifying this exact ruler is a deliberate choice. It clarifies that the event refers to the king of Aram who was in power during the city's destruction by Nebuchadnezzar, distinguishing him from Rezin, who was the king during an earlier attack led by Sennacherib [רד״ק].