Genesis 48:18

18 Joseph said to his father, "Not so, my father, for this one is the firstborn. Place your right hand on 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 has redeemed me from all evil, Bless the lads; And may my name live on in them, And the names of my fathers Abraham and Isaac; And may they grow into a multitude in the midst of the earth."

17 When Joseph saw that his father laid his right hand on Ephraim's head, it displeased him; and he grasped his father's hand to remove it from Ephraim's head to Manasseh's head.

18 Joseph said to his father, "Not so, my father, for this one is the firstborn. Place your right hand on his head."

19 But his father refused and said, "I know, my son, I know; he also will become a people and he also will be great. However, his younger brother shall be greater than he, and his descendants shall become a multitude of nations."

20 He blessed them that day, saying, "By you Israel will pronounce blessing, saying, 'May God make you like Ephraim and Manasseh!' " Thus he put Ephraim before Manasseh.