Judah is a lion's whelp: from the prey, my son, you are gone up: he stooped down, he crouched as a lion, and as a lioness; who shall rouse him up?
All Commentaries on Genesis 49:9 Go To Genesis 49
Cyril of Jerusalem
AD 386
Again, he is called a Lion; not a man eater, but, as it were, showing by this title his kingly, strong and resolute nature, Then too, he is called a Lion in opposition to the lion, our adversary who roars and devours those who have been deceived. For the Savior came, not having changed his own gentle nature, and yet as the mighty lion of the tribe of Judah, saving them that believe but trampling upon the adversary.