The S.W. border of the promised land was to be from 'the river of Egypt.' Genesis 15:18 . Here the word is nahar, and would seem to allude to the most eastern branch of the Delta of the Nile, called the Pelusiac mouth. In Numbers 34:5 'the river of Egypt' has the word nachal, signifying a winter torrent, and is supposed to refer to the Wady el Arish , 31 8' N, 33 50' E .