Genesis 48
19 Ref But his father would not, saying, I am doing it on purpose, my son; he will certainly become a nation and a great one; but his younger brother will be greater than he, and his seed will become a great family of nations.
20 Ref So he gave them his blessing that day, saying, You will be the sign of blessing in Israel, for they will say, May God make you like Ephraim and Manasseh; and he put Ephraim before Manasseh.