Give the Scripture you are referring to when you mention the Nile. I can only discuss the Scriptures, not someone's opinion without giving the text as the basis of their statement.
The KJV, as in the literal YLT does not use the name "Nile" anywhere, but uses "river". Consider the clear statements of God's word later.
"Judah and Israel were many, as the sand which is by the sea in multitude, eating and drinking, and making merry. And Solomon reigned over all kingdoms from the river unto the land of the Philistines, and unto the border of Egypt: they brought presents, and served Solomon all the days of his life." (1Kgs 4:20-21, KJV)
"And Solomon had four thousand stalls for horses and chariots, and twelve thousand horsemen; whom he bestowed in the chariot cities, and with the king at Jerusalem. And he reigned over all the kings from the river even unto the land of the Philistines, and to the border of Egypt." (2Chr 9:25-26, KJV)
"Thou art the LORD the God, who didst choose Abram, and broughtest him forth out of Ur of the Chaldees, and gavest him the name of Abraham; And foundest his heart faithful before thee, and madest a covenant with him to give the land of the Canaanites, the Hittites, the Amorites, and the Perizzites, and the Jebusites, and the Girgashites, to give it, I say, to his seed,
and hast performed thy words; for thou art righteous:" (Neh 9:7-8, KJV)
and hast performed thy words; for thou art righteous or as in the NRSV
and you have fulfilled your promise, for you are righteous. PAST TENSE! The land promise to Abraham has been fulfilled, as stated in Joshua 21:43-45 & 23:14-16.
It does not await a 'completion' in some future millennium. There is no way around Joshua 21:43-45 & 23:14-16
"Moreover thou gavest them kingdoms and nations, and didst divide them into corners: so they possessed the land of Sihon, and the land of the king of Heshbon, and the land of Og king of Bashan.
Their children also multipliedst thou as the stars of heaven, and broughtest them into the land, concerning which thou hadst promised to their fathers, that they should go in to possess it. So the children went in and possessed the land, and thou subduedst before them the inhabitants of the land, the Canaanites, and gavest them into their hands, with their kings, and the people of the land, that they might do with them as they would. And they took strong cities, and a fat land, and possessed houses full of all goods, wells digged, vineyards, and oliveyards, and fruit trees in abundance: so they did eat, and were filled, and became fat, and delighted themselves in thy great goodness." (Neh 9:22-25, KJV)