“Are you better than Thebes?”
Are you better than Thebes, stationed by the Nile with water around her, whose rampart was the sea, whose wall was the water? (Nahum 3:8 BSB)
What it sounds like today
A rhetorical question about some unfamiliar city.
The cultural key
The taunt is a history lesson Nineveh could not dodge. 'Thebes' is No-Amon, the great fortified capital of Upper Egypt, ringed and protected by the waters of the Nile ('whose rampart was the sea'), long thought impregnable. But in 663 BC the Assyrians themselves had stormed and sacked Thebes, dragging its people into exile, an event still in living memory. So Nahum, prophesying the fall of Nineveh (Assyria's own capital), rubs the empire's nose in its past: are you any safer than Thebes was? You destroyed that unconquerable river-fortress; now the same fate is coming for you. The rhetorical question only bites if you know that Thebes had already fallen, and fallen to Assyria's own army. A modern reader skims past an obscure place name; the first hearers heard a great city's recent, shocking ruin held up as Nineveh's mirror.
Recovered meaning
Thebes (No-Amon), Egypt's supposedly impregnable river-fortress capital, had itself been sacked by Assyria in 663 BC; Nahum throws that at Nineveh, if mighty Thebes fell, so will you. The jibe depends on knowing Thebes had already been destroyed.