Cush: the land along the Nile beyond Egypt's southern border, the kingdom and people who lived there, and the forefather whose name they carry
Hebrew took this name from Egyptian, where Kash was the ordinary word for Nubia, the stretch of the Nile valley above Egypt's southern frontier. In modern terms that is Sudan together with the far south of Egypt. It is not the country the world now calls Ethiopia, which lies further to the southeast. This word names the place and the nation; a separate word names a person from there (כּוּשִׁי), and a once-used longer spelling (כּוּשָׁן) may point to a different people altogether, in northern Arabia.
The name is put to three jobs across the Bible, and each one builds on the last:
- On the map, Cush marks the far south. It is where a river of Eden runs, where a famous gemstone comes from, and where an empire's reach or a border finally stops.
- In history, Cush is a kingdom with armies. Its kings ruled Egypt itself for most of a century, and one of them marches north against Assyria in Hezekiah's day. The prophets name Cush beside Egypt as a power Judah kept being tempted to lean on.
- In poetry and prophecy, Cush becomes a picture of the outermost horizon. Worshipers who come from beyond its rivers have come from as far away as anyone could imagine, and that distance is the whole point.
Genesis 10 adds one more use. There Cush is a son of Ham and the father of the peoples of the south. That family tree names nations as though they were people, in the same breath as Egypt and Canaan, so Cush there is the region itself standing at the head of its descendants rather than a private individual.
One pairing runs through nearly every mention: Cush and Egypt come as a set. They were neighbors, trading partners, and for a stretch of years one realm, and Israel's prophets hardly ever speak of the one without the other.