OUR LORD WHO BRINGS RETRIBUTION ON THOSE WHO COMMIT ATROCITIES
Amos chapter 1 verse 7 says this;
I will send fire on the walls of Gaza that will consume her fortresses.
Here, in a prophetic utterance by the prophet Amos, the Lord speaks judgement on Gaza, which is the land Southwest of Israel, because they took entire communities captive and sold them to the kingdom of Edom.
Because of their wholesale cruelty, their walls and fortresses were burned down. A fire was ignited along the perimeter of their cities and it spread to their fortresses and destroyed them.
Without fortresses, these cities were exposed to attacks that would result in those who dwelled in them being taken as captives and sold as slaves.
Their leaders in their main cities, Ashdod and Ashkelon, were slain because of their part in wiping out whole communities for profit by selling them to Edom. For this, the Lord set his hand to wipe out every last Philistine in Gaza.
This judgement on Gaza is reciprocal in that the evil that they did to others is visited upon them.
As the Lord Jesus said in Mathew 7 verse 12, "So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets.