पुष्पमूलफलैर्वाऽपि केवलैर्वर्तयेत् सदा । कालपक्वैः स्वयं शीर्णैर्वैखानसमते स्थितः ॥ २१ ॥
Or he may constantly subsist on flowers, roots, and fruit alone, which have been ripened by time and have fallen spontaneously, following the rule of the (Institutes) of Vikhanas.
भूमौ विपरिवर्तेत तिष्ठेद् वा प्रपदैर्दिनम् । स्थानासनाभ्यां विहरेत् सवनेषूपयन्नपः ॥ २२ ॥
Let him either roll about on the ground, or stand during the day on tiptoe, (or) let him alternately stand and sit down; going at the Savanas (at sunrise, at midday, and at sunset) to water in the forest (in order to bathe).
In summer let him expose himself to the heat of five fires, during the rainy season live under the open sky, and in winter be dressed in wet clothes, (thus) gradually increasing (the rigour of) his austerities.
When he bathes at the three Savanas (sunrise, midday, and sunset), let him offer libations of water to the manes and the gods, and practising harsher and harsher austerities, let him dry up his bodily frame.
Having reposited the three sacred fires in himself, according to the prescribed rule, let him live without a fire, without a house, wholly silent, subsisting on roots and fruit,