Santa's reindeer.
With a little old driver, so lively and quick,
I knew in a moment it must be St Nick.
More rapid than eagles his coursers they came,
And he whistled, and shouted, and called them by name!
"Now Dasher! now, Dancer! now, Prancer and Vixen!
On, Comet! On, Cupid! on, on Donner and Blitzen!
To the top of the porch! to the top of the wall!
Now dash away! Dash away! Dash away all!"
http://www.carols.org.uk/twas_the_night_before_christmas.htm