The Mekhilta draws yet another proof of prayer's supreme power from Jacob's blessing over the tribe of Judah. The Torah declares: "A lion's whelp is Judah" (Genesis 49:9). On the surface, this sounds like a martial image — Judah as a young lion, fierce and dominant in battle. But the Mekhilta reads it differently.
Just as a lion's power is in its mouth — its roar that terrifies, its jaws that crush — so too the power of Judah is in its mouth. And the mouth's greatest weapon is prayer. The lion does not conquer with cunning strategy or superior numbers. It opens its mouth and the world trembles. Judah, the royal tribe from which King David would descend, wielded the same kind of power: the raw force of words spoken to God.
The Mekhilta supports this reading with Moses' blessing in Deuteronomy: "And this is for Judah... Hear, O Lord, the voice of Judah" (Devarim 33:7). Moses did not ask God to strengthen Judah's armies or sharpen Judah's swords. He asked God to hear Judah's voice — the voice of prayer, the voice of supplication, the voice that rises from the battlefield and reaches the heavenly throne.
Together with the preceding teachings about Abraham, Isaac, and Jacob, this passage completes the Mekhilta's argument. From the patriarchs through the tribes, Israel's defining weapon has always been the same: the power of the mouth raised in prayer. The lion's roar and the worm's bite are the same force — the human voice directed toward God.