Genesis 48:12-14

12Then Joseph removed his sons from Jacob's knees. He bent down low, with his face towards the ground.

13He took his two sons near to Jacob. With his right hand, he put Ephraim beside Jacob's left hand. With his left hand, he put Manasseh beside Jacob's right hand.

14Jacob then put out his right hand. But he put it on Ephraim's head, even though Ephraim was the younger son. Jacob crossed his arms so that he put his left hand on Manasseh's head. Manasseh was Joseph's firstborn son.