Rudyard Kipling 
Just So Stories [EPUB ebook] 

In the beginning of years, when the world was so new and all, and the Animals were just beginning to work for Man, there was a Camel, and he lived in the middle of a Howling Desert because he did not want to work; and besides, he was a Howler himself. So he ate sticks and thorns and tamarisks and milkweed and prickles, most ‘scruciating idle; and when anybody spoke to him he said ‘Humph!’ Just ‘Humph!’ and no more.
Presently the Horse came to him on Monday morning, with a saddle on his back and a bit in his mouth, and said, ‘Camel, O Camel, come out and trot like the rest of us.’
‘Humph!’ said the Camel; and the Horse went away and told the Man.
Presently the Dog came to him, with a stick in his mouth, and said, ‘Camel, O Camel, come and fetch and carry like the rest of us.’
‘Humph!’ said the Camel; and the Dog went away and told the Man.
Presently the Ox came to him, with the yoke on his neck and said, ‘Camel, O Camel, come and plough like the rest of us.’
‘Humph!’ said the Camel; and the Ox went away and told the Man.
At the end of the day the Man called the Horse and the Dog and the Ox together, and said, ‘Three, O Three, I’m very sorry for you (with the world so new-and-all); but that Humph-thing in the Desert can’t work, or he would have been here by now, so I am going to leave him alone, and you must work double-time to make up for it.’