So I will send a fire upon the house of Hazael, and it shall devour the strongholds of Ben-hadad.
Now the Prophet subjoins, I will send fire unto the house of Hazael, which will devour the palaces of Ben-hadad. The Prophet speaks still of the kingdom of Syria; for we know that both Ben-hadad and Hazael were kings of Syria.
What the Lord says here may be explained by what he says Jer 12:14, Thus said the Lord, against all my evil neighbours that touch the inheritance of my people Israel, Behold, I will pluck them out. Damascus was a near neighbour to Israel on the north, Tyre and Gaza on the west, Edom on the south, Ammon and (in the next chapter) Moab on...
Commenting on Amos 1:3-15
But I will send a fire into the house of Hazael,.... For so doing; into his family, his sons' sons, one of whom perhaps was Rezin, that Tiglathpileser king of Assyria slew, as Aben Ezra observes. This denotes the judgments of God upon his posterity for his cruel usage of the Israelites; and designs an enemy that should come into his country, and war made...