You do not by any chance mean the First World war trenches version with the following words
It was Christmas day in the cookhouse
the happiest day of the year
Mens hearts were full of gladness
Their bellies full of beer
When up spoke Private Shorthouse
his face as bold as brassv Saying we don't want your christmas pudding
you can stick it up your....
Tidings of comfort and joy
good tidings of comfort and joy

It was christmas day in the Harem
The Eunuchs were standing all around
and hundreds of beautiful women
were stretched out on the ground
In came the bold bad sultan
and gazed at his marble halls
saying what do you want for Christmas boys
and the Eunuchsanswered....
Tidings of comfort and joy
good tidings of comfort and joy