The timing of the prophecies of the prophet Amos is explicitly given in the first verse:
These are the words of Amos, who was among the sheepherders of
Tekoa—what he saw concerning Israel two years before the earthquake,
in the days when Uzziah was king of Judah and Jeroboam son of Jehoash
was king of Israel.
We note two things about this:
- Amos prophesied AFTER the division between Judah to the south and the "Israel" to the north in about 930 BC.
- Amos prophesied before the final destruction of the northern kingdom of Israel in 722 BC by Assyria.
The prophecies of Amos concern the wickedness of Israel and its coming doom. His prophecies concern the sure fete of Israel, that it would be completely destroyed. Unfortunately, these prophecies were accurately fulfilled as described in 2 Kings 17.
Hoshea was the last king of Israel. The kingdom of Israel was destroyed by Assyria in 722 BC and repopulated with foreigners. The kingdom of Israel disappeared forever exactly as Amos 5:2 predicted.
However, the southern kingdom of Judah survived until it was destroyed in 586 BC by Nebuchadnezzar. The remnants of the Jews returned later under Zerubbabel in about 536 BC but the earthly kingdom of David never recovered.