He ceased; and mustering his might Sprang downward from the mountain height, While, shattered by each mighty limb, The trees unrooted followed him. The shadow on the ocean cast By his vast form, as on he passed, Flew like a ship before the gale When the strong breeze has filled the sail, And where his course the Vánar held The sea beneath him raged and swelled.

In plain words: Hanuman gathers his strength and jumps from the mountain. Trees are pulled up and follow after him, his huge shadow races across the ocean like a ship, and the sea swells beneath him.