A time is at hand. Théoden's hundreds will face your tens of thousands. And when all Rohan, your ancient oppressor, lies vanquished, then shall meet thy eastward and sweep all of Middle-earth beneath our feet. We cannot be defeated.
Lock up your children, the end is nigh.
For it's the onslaught of the Uruk-Hai.
The introductory dialogue is taken from a scene in the Ralph Bakshi animated LotR movie in which Saruman is addressing his troops. The song itself is preceded by a sampling from the Slayer song "Criminally Insane" (from the album Reign in Blood).