If you know your scriptures you would know the prophecy in Genesis 15:16 where God told Abraham that some of his descendants would return to the land where he was living in their own strength and that they would do so without any help from God.
You would also know this prophetic word: -
Genesis 28:13-15: - 13 And behold, the Lord stood above it and said: "I am the Lord God of Abraham your father and the God of Isaac; the earth on which you lie I will give this entity to your descendants. 14 Also your descendants shall be as the dust of the earth; they shall spread abroad to the west and the east, to the north and the south; and in you and in your seed all the families inhabiting My fertile soil shall be blessed. 15 Behold, I am with you and will keep you wherever you go and will bring you back to my fertile soil; for I will not leave you until I have done what I have spoken to you."
You are adding your conjecture to the scriptures:
That is not what that verse 16 says.prophecy in Genesis 15:16 where God told Abraham that some of his descendants would return to the land where he was living in their own strength and that they would do so without any help from God.
Genesis 15
13 And he said unto Abram, Know of a surety that thy seed shall be a stranger in a land that is not theirs, and shall serve them; and they shall afflict them four hundred years;
14 And also that nation, whom they shall serve, will I judge: and afterward shall they come out with great substance.
15 And thou shalt go to thy fathers in peace; thou shalt be buried in a good old age.
16 But in the fourth generation they shall come hither again: for the iniquity of the Amorites is not yet full.
In the fourth generation
This phrase indicates a specific time frame in which God’s promise to Abram will be fulfilled. The "fourth generation" can be understood as a period of approximately 400 years, as seen in the broader context of Genesis 15:13, where God tells Abram that his descendants will be strangers in a land not their own and will be enslaved and mistreated for 400 years. This aligns with the Israelites' time in Egypt before the Exodus. The use of "generation" here reflects the ancient Near Eastern understanding of a generation as roughly 100 years.
your descendants will return here
This promise refers to the land of Canaan, which God has promised to Abram and his descendants. The return signifies the fulfillment of God's covenant with Abram, where his descendants will inherit the land. This is a prophetic statement pointing to the eventual conquest of Canaan under Joshua, as recorded in the book of Joshua. The return also signifies God's faithfulness to His promises, despite the intervening period of hardship in Egypt.
for the iniquity of the Amorites is not yet complete
The Amorites were one of the Canaanite peoples inhabiting the land promised to Abram. This phrase suggests that God is allowing time for the Amorites to reach a full measure of sin before judgment is executed upon them. It reflects God's justice and patience, as He does not bring judgment prematurely. This concept is echoed in other scriptures, such as 2 Peter 3:9, which speaks of God's patience and desire for repentance. The eventual conquest of Canaan is thus portrayed as a divine judgment on the Amorites' accumulated sin, rather than an arbitrary act of aggression by the Israelites.