[634] The Venerable Udena said this: "And what, brahmin, is the individual who mortifies himself, committed to the practice of mortifying himself? Here, brahmin, a certain individual goes naked, rejecting conventions, licking his hands; he does not come when asked to come, nor stay when asked to stay; he does not consent to food brought to him, nor to food prepared specifically for him, nor to an invitation to a meal. He does not receive anything from the mouth of a pot, nor from the mouth of a basket, nor across a threshold, nor across a stick, nor across a pestle; nor from two people eating together, nor from a pregnant woman, nor from a woman giving suck, nor from a woman lying with a man; nor food gathered by public announcement, nor where a dog is standing by, nor where flies are swarming in swarms; he accepts no fish, no meat; he drinks no liquor, no wine, no fermented gruel. He keeps to one house, to one morsel; or to two houses, to two morsels … or to seven houses, to seven morsels. He subsists on one small bowlful, or subsists on two small bowlfuls, or subsists on three small bowlfuls … or subsists on seven small bowlfuls. He takes food once a day, or takes food once every two days … or takes food once every seven days; thus he dwells committed to the practice of eating food at stated intervals, even up to half a month. He feeds on greens, or feeds on millet, or feeds on wild rice, or feeds on poor rice (daddula), or feeds on water plants, or feeds on rice bran, or feeds on rice-scum, or feeds on sesame flour, or feeds on grass, or feeds on cow dung; he subsists on forest roots and fruits, feeding on fallen fruit. He wears garments of hemp, or wears garments of hemp mixed with other fibres, or wears shrouds of corpses, or wears rag-robes, or wears garments of tree bark, or wears an antelope hide, or wears a garment of antelope-hide strips, or wears a covering of kusa grass, or wears a covering of bark fibre, or wears a covering of wood shavings, or wears a blanket of human hair, or wears a blanket of animal hair, or wears owls' wings. He is a puller-out of hair and beard, committed to the practice of pulling out hair and beard; he is a stander, rejecting seats; he is a squatter, committed to exertion in the squatting posture; he is one who uses a bed of thorns, making his bed upon a bed of thorns; he dwells committed to the practice of going down to the water to bathe three times daily, the evening bath being the third. Thus in such various ways he dwells committed to the practice of tormenting and mortifying the body. This, brahmin, is called an individual who mortifies himself, committed to the practice of mortifying himself."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.