What does Deuteronomy 33:17 mean?

Joseph is strong and majestic, like a bull with powerful horns. He’ll use that strength to push nations away, all the way to the ends of the earth. These are the tribes of Ephraim and Manasseh. Deuteronomy 33:17 - Modern Text Bible

(Joseph’s descendants, Ephraim and Manasseh, are pictured as powerful and influential, spreading far and wide.)