Mbh 13.141.16c

Abstention from all luxurious viands prepared from cow's milk, taking a pleasure in tranquillity of heart, lying on bare rocks or the earth, devotion to Yoga, eating potherbs and leaves of trees, and subsisting upon fruits and roots and wind and water and moss, are some of the practices of the Rishis by which they attain to the end that belongs to persons unsubjugated (by the world). When the smoke has ceased to curl upwards from a house, when the husking machine has ceased to ply, when the hearth-fire has been extinguished, when all the inmates have taken their food, when dishes are no longer carried from room to room, when mendicants have ceased to walk the streets, it is then that the man who is devoted to the religion of truth and tranquillity of soul, desiring to have a guest (but finding his desire ungratified), should eat what remnant of food may still occur in the house. By acting in this way, one becomes a practiser of the religion of the Munis. One should not be arrogant, nor proud, nor cheerless and discontented; nor should one wonder at anything. Indeed, one should behave equally towards friends and foes. Verily, one who is the foremost of all persons conversant with duties should also be friendly towards all creatures."'"'"