Charles Ellicott Commentary Deuteronomy 33:7

"And this is [the blessing] of Judah: and he said, Hear, Jehovah, the voice of Judah, And bring him in unto his people. With his hands he contended for himself; And thou shalt be a help against his adversaries." — Deuteronomy 33:7 (ASV)

And this (he said) of Judah. —The words that follow are a kingly blessing: Hear, Lord, the voice of Judah, and bring him to his people. In other words, when we think of the Lion of the tribe of Judah, Thy kingdom come. Rashi reminds us of the many prayers in Old Testament history that were heard from Judah’s lips.

The prayers of David and Solomon; of Asa and Jehoshaphat; of Hezekiah against Sennacherib;—and, we may add, of King Manasseh, and Daniel the prophet—were all “the voice of Judah.” The last line of Old Testament history is a prayer of Judah by the mouth of Nehemiah, Remember me, O my God, for good. The psalms of David, again, are all “the voice of Judah.” And, best of all, every prayer of our Lord’s is “the voice of Judah” also. The remainder of the blessing is easily understood. The hands of Judah embrace those Hands that were sufficient for the salvation of mankind. His enemies include all, even to Death, the last enemy, whom God shall subdue under His feet.