At Sāvatthi.

"Bhikkhus, have you heard the jackal howling during the early hours of the night, at the break of dawn?"

"Yes, venerable sir."

"Bhikkhus, that jackal is afflicted with a disease called mange. Wherever it wishes to go, it goes; wherever it wishes to stand, it stands; wherever it wishes to sit, it sits; and wherever it wishes to lie down, it lies down. And a cool breeze even blows upon him. It would be fortunate, bhikkhus, for a certain person here claiming to be a follower of the Sakyan son if he were to experience even such a form of personal existence.

Therefore, bhikkhus, you should train yourselves thus: 'We will dwell diligently.' Thus, bhikkhus, you should train yourselves."