Here is another longer exerpt from a different
commentary...
Here is an exerpt of one of the commentaries on this.
The Adoption of Manasseh and Ephraim
(48:1-7)
The last days of Jacobs earthly sojourn drew to a close. Sensing
this, Joseph was summoned to his fathers side where Jacob
pronounced a unique blessing upon him. The death of which Jacob had
so frequently spoken and, at one time, desired was now soon to
visit him. Joseph took his two sons, Manasseh and Ephraim, along
with him to see their grandfather one final time and to bid him
farewell. Gathering up his strength, Jacob sat up in bed in order
to speak words of vital significance to Joseph. While Jacobs words
were reminiscent of the past, this was no muddled musing as one
might expect of an aged man nearing his final hour. Instead, Jacob
focused Josephs attention upon the two most important events of
his life as an explanation for what he was about to do.
Now it came about after these things that Joseph was told, Behold,
your father is sick. So he took his two sons Manasseh and Ephraim
with him. When it was told to Jacob, Behold, your son Joseph has
come to you, Israel collected his strength and sat up in the bed.
Then Jacob said to Joseph, God Almighty appeared to me at Luz in
the land of Canaan and blessed me, and He said to me, Behold, I
will make you fruitful and numerous, and I will make you a company
of peoples, and will give this land to your descendants after you
for an everlasting possession. And now your two sons, who were
born to you in the land of Egypt before I came to you in Egypt, are
mine; Ephraim and Manasseh shall be mine, as Reuben and Simeon are.
But your offspring that have been born after them shall be yours;
they shall be called by the names of their brothers in their
inheritance (Genesis 48:1-6).
Twice God had appeared to Jacob at Luz (Bethel, 28:10-17; 35:9-12),
and in both appearances God had blessed him, promising him that he
would become a great nation and that he would possess the land of
Canaan. While it was nowhere recorded that God specifically
promised Jacob that the land would be an everlasting possession
(verse 4), it was told Abram in 17:7. This was probably orally
passed on through Isaac.
Josephs sons, Manasseh and Ephraim,102 were born in the land of
Egypt. As sons of Joseph their future in Egypt may have seemed very
bright. Perhaps they might fill the shoes of their father, taking
places of power and influence in Pharaohs administration. But
their greatest hope lay in a land they had not yet seen, for they
were destined to be a part of the company of peoples (verse 4)
that God had promised Jacob.
Reuben, due to his sin of laying with Bilhah, Jacobs concubine
(35:22), would be stripped of his birthright (cf. 49:4). This
privilege was conveyed upon Joseph, but in an unusual way. No doubt
the normal course would have been to give the birthright to the
next son, Simeon, or to the next after him, Levi, but both of these
sons were guilty of the mass murder of the Shechemites (34:25ff.).
It was Joseph instead who was to receive the rights of the
firstborn:
Now the sons of Reuben the firstborn of Israel (for he was the
firstborn, but because he defiled his fathers bed, his birthright
was given to the sons of Joseph the son of Israel; so that he is
not enrolled in the genealogy according to the birthright. Though
Judah prevailed over his brothers, and from him came the leader,
yet the birthright belonged to Joseph) (I Chronicles 5:1-2).
Jacob achieved his purpose by adopting both of Josephs sons as his
own, on a par with Reuben and Simeon (verse 5). Now each of them
would receive one portion, but in so doing Joseph received a double
portion:
And I give you one portion more than your brothers, which I took
from the hand of the Amorite with my sword and my bow (Genesis
48:22).
The effect, as noted by the chronicler, was to give the birthright
to Joseph. Any other sons which might be born to Joseph (but dont
seem to have been) would receive their inheritance as though they
were the sons of either Ephraim or Manasseh (verse 6).
The twin appearances of God to Jacob at Bethel (once before he
departed from Canaan to seek a wife in Haran (28:10-17) and once
after he returned to Canaan from Paddan-aram (35:9-15)) were even
more significant in the light of the partial fulfillment of Gods
promises to him in these appearances. God had promised Jacob that
he would be with him to guide, protect, and provide, and that He
would bring him safely back to Canaan. This God had done, in spite
of the dangers he had faced and the obstacles that were in his
path. Since Gods word had been fulfilled in the short-term
promises, surely His more distant promises were assured also.
The primary focus of Jacob in his report to Joseph was the promise
of the land of Canaan and the assurance that Jacob would become a
numerous people, a company of peoples (verse 4). If God had assured
Jacob of becoming a great and numerous people, then surely he was
justified in adopting two more sons who would contribute to this
proliferation of people.
If the justification for Jacobs adoption of Josephs sons is found
in the promise God had made at Bethel, the reason seems to be
reported in verse 7:
Now as for me, when I came from Paddan, Rachel died, to my sorrow,
in the land of Canaan on the Journey, when there was still some
distance to go to Ephrath; and I buried her there on the way to
Ephrath (that is, Bethlehem) (Genesis 48:7).
Joseph was the son of Rachel, Jacobs chosen wife. His partiality
to Joseph significantly contributed to Josephs rejection by his
brothers and his journey to Egypt (cf. 37:4). A major factor in his
preference for Joseph was the fact that he was the first-born of
Rachel, his bride by choice. (Leah was his wife by chance, Bilhah
and Zilpah by competition.)
While Rachel was the younger of his wives, she died prematurely on
the way to Ephrath (Bethlehem). By inference, had she not died so
early in life she would have presented Jacob with many other sons.
The adoption of Ephraim and Manasseh provided Jacob with two more
sons, technically through Rachel. The promise of God at Bethel in
combination with the preference of Jacob for Rachel provides the
backdrop for the adoption of Ephraim and Manasseh. In addition to
this must be mentioned the faithfulness of Joseph to the God of his
fathers, even while in a foreign land and in adverse circumstances.
He, as the savior of his people, surely was worthy of the favor his
father bestowed upon him.
To read the full article, go here The View From the
Graveyard