Amalek

Amalek is the opposing force whose battlefield fortunes rise and fall in direct correlation to Moses' arms — when Moses' hands drop, Amalek advances, making the enemy's strength a visible measure of interrupted intercession.

Amalek is pronounced upon here as a nation that rose to early prominence but faces final ruin — the first of Balaam's closing oracles delivering the same verdict that would echo through Israel's later history with this enemy.