We sing praise of total war.
against the Saracens we abhor.
to free the tomb of Christ our Lord
we’ll put the known world to the sword.
from an old Dr. Who
https://youtu.be/XCK5pipHeZY
Entertaining. But here is a real one from the Templars in Holy Praise on the Crusades (that would really scare the pooh out of the Saracen mahometans):
Salve Regina:
https://www.youtube.com/watch?v=IoSuyUFiEYo