Vernon Jones (1912)
180. THE HEIFER AND THE OX
A Heifer went up to an Ox, who was straining hard at the plough, and sympathised with him in a rather patronising sort of way on the necessity of his having to work so hard. Not long afterwards there was a festival in the village and every one kept holiday: but, whereas the Ox was turned loose into the pasture, the Heifer was seized and led off to sacrifice. "Ah," said the Ox, with a grim smile, "I see now why you were allowed to have such an idle time: it was because you were always intended for the altar."
Aesop's Fables: A New Translation by V.S. Vernon Jones with illustrations by Arthur Rackham (1912). This book is available online at Project Gutenberg.