Genesis 48:14

But Israel stretched out his right hand and laid it on the head of Ephraim, who was the younger, and his left hand on Manasseh’s head, crossing his hands, although Manasseh was the firstborn.

Deuteronomy 33:17

“As the firstborn of his ox, majesty is his, And his horns are the horns of the wild ox; With them he will push the peoples, All at once, to the ends of the earth. And those are the ten thousands of Ephraim, And those are the thousands of Manasseh.”

Jeremiah 31:9

“With weeping they will come, And by supplication I will lead them; I will make them walk by streams of waters, On a straight path in which they will not stumble; For I am a father to Israel, And Ephraim is My firstborn.”