[47] The Blessed One said this: "Suppose, householder, a dog, overcome by hunger and weakness, were to stand waiting at a cow-butcher's slaughterhouse. A skilled cow-butcher or a cow-butcher's apprentice would toss it a skeleton of bones, well scraped, scraped clean, fleshless, smeared with blood. What do you think, householder? Could that dog, licking that skeleton of bones — well scraped, scraped clean, fleshless, smeared with blood — dispel its hunger and weakness?"
"Certainly not, venerable sir. For what reason? Because, venerable sir, that skeleton of bones is well scraped, scraped clean, fleshless, smeared with blood; and that dog would only have a share of weariness and vexation."
"Even so, householder, a noble disciple reflects thus: 'Sensual pleasures have been said by the Blessed One to be like a skeleton of bones; they bring much suffering (dukkha) and much despair (upāyāsa), and the danger (ādīnava) therein is still greater.' Having seen this thus as it really is (yathābhūta) with right wisdom, having avoided that equanimity (upekkhā) which is diversified, based on diversity, he develops only that equanimity which is unified, based on unity, wherein clingings to the worldly bait (lokāmisa) cease entirely, without remainder."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.