כֹּ֚ה אָמַ֣ר יְהוָ֔ה עַל־שְׁלֹשָׁה֙ פִּשְׁעֵ֣י עַזָּ֔ה וְעַל־אַרְבָּעָ֖ה לֹ֣א אֲשִׁיבֶ֑נּוּ עַל־הַגְלוֹתָ֛ם גָּל֥וּת שְׁלֵמָ֖ה לְהַסְגִּ֥יר לֶאֱדֽוֹם׃
Thus saith the LORD: For three transgressions of Gaza, yea, for four, I will not reverse it: because they carried away captive a whole captivity, to deliver them up to Edom.
Read halakhic rulings (Jewish law) on Amos 1:6: and classical halakhic sources.