Ethiopia (Aethiopia)
The Greek name for the lands south of Egypt, along the upper Nile.
Today: Sudan
The Plague at Athens, and Pericles Answers the Athenians
Thucydides, History of the Peloponnesian War, Book 2 (sections 47–65) · after 430 BCE (events of 430–429 BCE)
2.48.1
ἤρξατο δὲ τὸ μὲν πρῶτον, ὡς λέγεται, ἐξ Αἰθιοπίας τῆς ὑπὲρ Αἰγύπτου, ἔπειτα δὲ καὶ ἐς Αἴγυπτον καὶ Λιβύην κατέβη καὶ ἐς τὴν βασιλέως γῆν τὴν πολλήν.
It began, people say, in Ethiopia, beyond Egypt. From there it spread down into Egypt and Libya and across most of the Persian Empire.