The Nile was the border of Egypt in those days. It served as the boundary and guard for Egypt's eastern border.
The Nile was the border of Egypt in those days. It served as the boundary and guard for Egypt's eastern border.
15:18-21 describes what is referred to in Jewish tradition as Gevulot Ha-aretz ("Borders of the Land") regarded as the full extent of the land promised to Abraham. Numbers 34:1-15 describes the land allocated to the Israelite tribes after the Exodus. The tribes of Reuben, Gad and half of Manasseh received land east of the Jordan as explained in Numbers 34:14-15. Numbers 34:1-13 provides a detailed description of the borders of the land allocated to the remaining tribes. The region is called "the Land of Canaan" (Eretz Kna'an) in Numbers 34:2 and the borders are known in Jewish tradition as the "borders for those coming out of Egypt". The English expression "Promised Land" can denote either the land promised to Abraham in Genesis or the land of Canaan, although the latter meaning is more common.
http://en.wikipedia.org/wiki/Land_of_Israel#The_Promised_Land
I haven't seen any map of Solomon's kingdom that him controlling the terrority to the Nile.