An oracle is a message of judgment. Amos proceeded to deliver eight of these, seven against Israel's neighbors including Judah (1:3-2:5) and one against Israel (2:6-6:14).12The order is significant. The nations mentioned first were foreign, but those mentioned next were the blood relatives of the Israelites, and Judah was its closest kin. Upon hearing this list the Israelites would have felt "a noose of judgment about to tighten round their [the Israelites' own] throats."13This is the "rhetoric of entrapment."14
"The prophet began with the distant city of Damascus and, like a hawk circling its prey, moved in ever-tightening circles, from one country to another, till at last he pounced on Israel. One can imagine Amos's hearers approving the denunciation of these heathen nations. They could even applaud God's denunciation of Judah because of the deep-seated hostility between the two kingdoms that went as far back as the dissolution of the united kingdom after Solomon. But Amos played no favorites; he swooped down on the unsuspecting Israelites as well in the severest language and condemned them for their crimes."15
Each oracle follows the same basic pattern. First, Amos declared the judgment to come. Second, he defended the judgment by explaining the reason for it. Third, he described the coming judgment.16
Other collections of oracles against foreign neighbors appear in Isaiah (chs. 13-17, 19, 21, 23, 34) , Jeremiah (chs. 46-51), and Ezekiel (chs. 25-32). One might also consider Obadiah and Nahum as oracles against foreign nations as well.