6 This is what the LORD says: “For three sins of Gaza, even for four, I will not relent. Because she took captive whole communities and sold them to Edom,

References for Amos 1:6

7 I will send fire on the walls of Gaza that will consume her fortresses.
8 I will destroy the kinga of Ashdod and the one who holds the scepter in Ashkelon. I will turn my hand against Ekron, till the last of the Philistines are dead,” says the Sovereign LORD.

References for Amos 1:8