(from the Welsh) 
 
May they stumble, stage by stage 
On an endless Pilgrimage 
Dawn and dusk, mile after mile 
At each and every step a stile 
At each and every step withal 
May they catch their feet and fall 
At each and every fall they take 
May a bone within them break 
And may the bone that breaks within 
Not be, for variations sake 
Now rib, now thigh, now arm, now shin 
but always, without fail, the NECK
Robert Graves
http://www.poemhunter.com/poem/the-travellers-curse-after-misdirection/