The river — Called the river of Egypt, lay directly in the way to Egypt from Jerusalem. The great sea — To the south — west part of the Mediterranean sea near Gaza.
Related Commentaries of Ezekiel 47:19
Ezekiel 47:19
19 And the south side southward, from Tamar even to the waters of strifef in Kadesh, the river to the great sea. And this is the south side southward.