15 Then he blessed Joseph and said, "May the God before whom my grandfather Abraham and my father, Isaac, walked- the God who has been my shepherd all my life, to this very day, 16 the Angel who has redeemed me from all harm- may he bless these boys. May they preserve my name and the names of Abraham and Isaac. And may their descendants multiply greatly throughout the earth." 17 But Joseph was upset when he saw that his father placed his right hand on Ephraim's head. So Joseph lifted it to move it from Ephraim's head to Manasseh's head. 18 "No, my father," he said. "This one is the firstborn. Put your right hand on his head." 19 But his father refused. "I know, my son; I know," he replied. "Manasseh will also become a great people, but his younger brother will become even greater. And his descendants will become a multitude of nations." 20 So Jacob blessed the boys that day with this blessing: "The people of Israel will use your names when they give a blessing. They will say, 'May God make you as prosperous as Ephraim and Manasseh.'" In this way, Jacob put Ephraim ahead of Manasseh.
Matthew Henry's Commentary on Genesis 48:15-20
Commentary on Genesis 48:8-22
(Read Genesis 48:8-22)
The two good men own God in their comforts. Joseph says, They are my sons whom God has given me. Jacob says, God hath showed me thy seed. Comforts are doubly sweet to us when we see them coming from God's hand. He not only prevents our fears, but exceeds our hopes. Jacob mentions the care the Divine providence had taken of him all his days. A great deal of hardship he had known in his time, but God kept him from the evil of his troubles. Now he was dying, he looked upon himself as redeemed from all sin and sorrow for ever. Christ, the Angel of the covenant, redeems from all evil. Deliverances from misery and dangers, by the Divine power, coming through the ransom of the blood of Christ, in Scripture are often called redemption. In blessing Joseph's sons, Jacob crossed hands. Joseph was willing to support his first-born, and would have removed his father's hands. But Jacob acted neither by mistake, nor from a partial affection to one more than the other; but from a spirit of prophecy, and by the Divine counsel. God, in bestowing blessings upon his people, gives more to some than to others, more gifts, graces, and comforts, and more of the good things of this life. He often gives most to those that are least likely. He chooses the weak things of the world; he raises the poor out of the dust. Grace observes not the order of nature, nor does God prefer those whom we think fittest to be preferred, but as it pleases him. How poor are they who have no riches but those of this world! How miserable is a death-bed to those who have no well-grounded hope of good, but dreadful apprehensions of evil, and nothing but evil for ever!