Contradiction with Genesis 17:8
Genesis 17:8 confirms the everlasting possession of the land of Canaan, while Genesis 48:4 speaks of multiplying and giving the land to descendants, seemingly without mentioning permanency.
Genesis 17:8: And I will give unto thee, and to thy seed after thee, the land wherein thou art a stranger, all the land of Canaan, for an everlasting possession; and I will be their God. [wherein...: Heb. of thy sojournings]
Contradiction with Exodus 32:13
This verse refers to giving the land to the descendants forever, while Genesis 48:4 emphasizes multiplying them without the "forever" aspect.
Exodus 32:13: Remember Abraham, Isaac, and Israel, thy servants, to whom thou swarest by thine own self, and saidst unto them, I will multiply your seed as the stars of heaven, and all this land that I have spoken of will I give unto your seed, and they shall inherit [it] for ever.
Contradiction with Numbers 14:30
The verse states some will not see the promised land, contradicting Genesis 48:4 about giving the land to descendants.
Numbers 14:30: Doubtless ye shall not come into the land, [concerning] which I sware to make you dwell therein, save Caleb the son of Jephunneh, and Joshua the son of Nun. [sware: Heb. lifted up my hand]
Contradiction with Deuteronomy 1:35
This verse claims a generation would not see the promised land, conflicting with Genesis 48:4 about giving the land to descendants.
Deuteronomy 1:35: Surely there shall not one of these men of this evil generation see that good land, which I sware to give unto your fathers,