Mbh 12.112.3a

"'"The camel said, 'Let my neck, O holy one, become long through thy grace, so that, O puissant lord, I may be able to seize any food that may lie even at the end of even a hundred Yojanas.' The high-souled giver of boons said, 'Let it be so.' The camel then, having obtained the boon, returned to his own forest. The foolish animal, from the day of obtaining the boon, became idle. Indeed, the wretch, stupefied by fate, did not from that day go out for grazing. One day, while extending his long neck of a hundred Yojanas, the animal was engaged in picking his food without any labour, a great storm arose. The camel, placing his head and a portion of the neck within the cave of a mountain, resolved to wait till the storm would be over. Meanwhile it began to pour in torrents, deluging the whole earth. A jackal, with his wife, drenched by the rain and shivering with cold, dragged himself with difficulty towards that very cave and entered it quickly for shelter. Living as he did upon meat, and exceedingly hungry and tired as he was, O bull of Bharata's race, the jackal, seeing the camel's neck, began to eat as much of it as he could. The camel, when he perceived that his neck was being eaten, strove in sorrow to shorten it. But as he moved it up and down, the jackal and his wife, without losing their hold of it, continued to eat it away. Within a short time the camel was deprived of life. The jackal then, having (thus) slain and eaten the camel, came out of the cave after the storm and shower had ceased. Thus did that foolish camel meet with his death. Behold, what a great evil followed in the train of idleness. As regards thyself, avoiding idleness and restraining thy senses, do everything in the world with proper means. Manu himself has said that victory depends upon intelligence.