Gaza in the Bible

Here is a commentary about Gaza and Palestine in the Holy Bible

Philistia (Amos 1:6-8): The southern coastal plain of Palestine was occupied by the Philistines, who lived in five main cities (Ashdod, Ashkelon, Ekron, Gath and Gaza). Four of these are mentioned in this oracle. Indeed, among all the biblical prophecies of the Philistines hereafter, Gath is conspicuously left out. "It is noteworthy that Gath is not mentioned in these prophecies, from which it may be inferred that Gath ceased to be of any major significance after the time of Uzziah" ("Philistines," The International Standard Bible Encyclopedia, 1986, p. 843).
Of taking "captive the whole captivity," the JFB Commentary says, "i.e., they left none.... Under Jehoram already the Philistines had carried away all the substance of the king of Judah, and his wives and his sons, 'so that there was never a son left to him, save Jehoahaz'; and after Amos' time (if the reference includes the future, which to the prophet's eye is as if already done), under Ahaz (II Chron. 28:18), they seized on all the cities and villages of the low country and south of Judah" (note on 1:6). Then we learn that they "deliver them up to Edom" (verse 6). "Judah's bitterest foe; as slaves (vs. 9; cf. Joel 3:1, 3, 6). [Commentator] Grotius refers to the fact (Isa. 16:4) that on Sennacherib's invasion of Judah [yet future at this point], many fled for refuge to neighboring countries; the Philistines, instead of hospitably sheltering the refugees, sold them, as if captives in war, to their enemies, the Idumeans" (note on Amos 1:6). God's punishment is to send "fire." Again, JFB says, "i.e., the flames of war (Num. 21:28; Isa. 26:11). Hezekiah fulfilled this prophecy, smiting the Philistines unto Gaza (II Kings 18:8). Foretold by Isaiah 14:29, 31" (note on Amos 1:7). It is, of course, possible that these statements refer dually or even solely to events that are yet future. A large part of the territory of ancient Philistia is today the Palestinian Gaza Strip.

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The original in the bible is here
Amos 1:6-8
Thus saith the LORD; For three transgressions of Gaza, and for four, I will not turn away the punishment thereof; because they carried away captive the whole captivity, to deliver them up to Edom:
But I will send a fire on the wall of Gaza, which shall devour the palaces thereof:
And I will cut off the inhabitant from Ashdod, and him that holdeth the sceptre from Ashkelon, and I will turn mine hand against Ekron: and the remnant of the Philistines shall perish, saith the Lord GOD.