Judah shall go up— This was the most numerous and most valiant of the tribes, Genesis 49:8.; and is commanded to go up, says Houbigant, because those nations were to be subdued which were in the lot of this tribe, as appears from the third verse, Come up to me into my lot.
Related Commentaries of Judges 1:2
Judges 1:2
2 And the LORD said, Judah shall go up: behold, I have delivered the land into his hand.