Mahabharata, Adi Parva (Book of the Beginning)
Last sloka of the first chapter: Anukramanika Parva
Translation by Kisari Mohan Ganguli
Mortification is not dregs, Vedic study is not dregs, and the nature-given rules of the Veda are not dregs, the vigorous acquisition of wealth is not dregs - but that is what they become when they are beaten by the beings.
Translation by J. A. B. van Buitenen