Genesis 48:18

18 And Joseph said unto his father, "Not so, my father, for this is the firstborn. Put thy right hand upon his head."

Genesis 48:18 Meaning and Commentary

Genesis 48:18

And Joseph said unto his father, not so, my father
It is not right, it should not so be, that the right hand should be put on the youngest, and the left hand on the eldest; for this [is] the firstborn;
directing him to Manasseh, and seeking to guide his hand towards him: put thy right hand upon his head;
Joseph was for proceeding according to the order of birthright, but Jacob was directed by a spirit of prophecy, as follows.

Genesis 48:18 In-Context

16 the Angel who redeemed me from all evil, bless the lads; and let my name be named on them, and the name of my fathers Abraham and Isaac; and let them grow into a multitude in the midst of the earth."

17 And when Joseph saw that his father laid his right hand upon the head of Ephraim, it displeased him; and he held up his father's hand to remove it from Ephraim's head unto Manasseh's head.

18 And Joseph said unto his father, "Not so, my father, for this is the firstborn. Put thy right hand upon his head."

19 And his father refused and said, "I know it, my son, I know it. He also shall become a people, and he also shall be great; but truly his younger brother shall be greater than he, and his seed shall become a multitude of nations."

20 And he blessed them that day, saying, "In thee shall Israel bless, saying, `God make thee as Ephraim and as Manasseh.'" And he set Ephraim before Manasseh.