Mbh 1.119.4

Pandu replied, ‘If, indeed, this your resolve springeth from virtue, then with you both I shall follow the imperishable path of my fathers. Abandoning the luxuries of cities and towns, clad in barks of trees, and living on fruits and roots, I shall wander in deep woods, practising the severest penances. Bathing morning and evening, I shall perform the homa. I shall reduce my body by eating very sparingly and shall wear rags and skins and knotted locks on my head. Exposing myself to heat and cold and disregarding hunger and thirst, I shall reduce my body by severe ascetic penances, I shall live in solitude and I shall give myself up to contemplation; I shall eat fruit, ripe or green, that I may find. I shall offer oblations to the Pitris (manes) and the gods with speech, water and the fruits of the wilderness. I shall not see, far less harm, any of the denizens of the woods, or any of my relatives, or any of the residents of cities and towns. Until I lay down this body, I shall thus practise the severe ordinances of the Vanaprastha scriptures, always searching for severer ones that they may contain.’