Ezekiel 25:6-7

Because the Ammonites had rejoiced over Israel’s misfortune the Lord would punish them and give them as the spoils of war to other nations. He would end their existence as a separate nation and destroy them as a people. Ammon no longer existed as a nation after Nebuchadnezzar destroyed it and Bedouins from the east plundered it. [Note: Davidson, p. 180.] This judgment would teach them that Yahweh is God.

"Oracles against foreign nations are always implicitly oracles of encouragement for God’s people." [Note: Stuart, p. 250.]

Jeremiah predicted that Yahweh would restore the fortunes of the Ammonites (Jeremiah 49:6). This occurred briefly after the Exile. Tobiah was a Persian governor of Ammon during the postexilic period (cf. Nehemiah 2:10; Nehemiah 2:19; Nehemiah 4:7). But restoration of this region will also take place in the Millennium (cf. Jeremiah 46:26-28; Jeremiah 48:47).