From The Two Towers, Book III, Chapter IV

We come, we come with roll of drum: ta-runda runda runda rom!
We come, we come with horn and drum: ta-runa, runa, runa rom!
To Isengard! Though Isengard be ringed and barred with doors of stone;
Though Isengard be strong and hard, as cold as stone and bare as bone,
We go, we go, we go to war, to hew the stone and break the door;
For bole and bough are burning now, the furnace roars-we go to war!
To Isengard with doom we come!
With doom we come, with doom we come!

-J.R.R. Tolkien