כֹּ֚ה אָמַ֣ר יְהוָ֔ה עַל־שְׁלֹשָׁה֙ פִּשְׁעֵ֣י מוֹאָ֔ב וְעַל־אַרְבָּעָ֖ה לֹ֣א אֲשִׁיבֶ֑נּוּ עַל־שָׂרְפ֛וֹ עַצְמ֥וֹת מֶֽלֶךְ־אֱד֖וֹם לַשִּֽׂיד׃
Beginilah firman Yang Mahakekal: Karena tiga pelanggaran Moab, bahkan karena empat, Aku tidak akan membiarkannya tanpa balasan, karena ia telah membakar tulang-tulang raja Edom hingga menjadi kapur.
Or HaChaim
I believe that this consideration helps to explain a verse in Job 33,29 according to which G'd gives man two or three chances before decreeing something final resulting in his death. Why was Adam not measured by that yardstick? In fact, when it comes to sins committed by a community of people, we know on the authority of Amos 2,1, that G'd will forgive Israel's sins three times and only on the fourth occasion will He no longer forgive. There is, however, a good reason why G'd did not apply the yardsticks mentioned in either Job or Amos to אדם הראשון, the first man. On the day G'd created Adam He made him of totally good components, so that no part of him was either mentally or physically worthless which would cause him to go astray. Once he sinned he became the prototype of a sinner and the evil his life-force, נפש had absorbed became a part of every subsequent Israelite's body and soul. Even man's body absorbed that vestige of sin and the reminder of that contamination is the foreskin with which males are born. Keeping in mind that we all suffer from a handicap Adam had not suffered from, G'd decided to allow man up to three repetitions of mortal sins before making a decree final. It is man's heritage from the moment he emerges from his mother's womb to be infected with this evil pollutant. This pollutant endeavours to make man sin intentionally. It also endeavours to make him sin through mere thoughtlessness. In this latter case, the sin-offering helps to secure penitent Man atonement for such thoughtlessness. Although it is true that Adam's sin was also due to thoughtlessness, G'd dealt fairly with him by not allowing him a second chance seeing he did not have to overcome a spiritual or physical pollutant which urged him to disobey his Maker.
Radak
"A great wrath came upon Israel" - from the king of Edom, since he had thought that with their help he would save his son from captivity under the king of Moab. This is what the scripture "because he burned the bones of the king of Edom into lime" (Amos 2:1) means. And my rabbi and brother, R' Moses of blessed memory interpreted this to mean that when the king of Moab planned to break through to the king of Edom, then and there he took his son captive. In that very war he abducted him from them, and then he brought him up on the wall and burned him before his father's eyes. A great wrath came upon Israel from the king of Edom, since they hadn't helped him save him [his son] from them [Moab]...
Rashi
for from the North smoke has come Retribution harsh as smoke shall come upon them from the north. Gaza and its boundaries, which Hezekiah smote, were in the south of Eretz Israel in the southwestern corner. Eretz Israel is found to be north of it. And so we find in Sifrei in Ha’azinu 322: They attempted to flee through the south, and they turned them over, as it is stated (Amos 1:6): “For three transgressions of Gaza... [because of their exiling a complete exile to deliver to Edom.]” Hence, we learn that Gaza is on the south.