Lord Krishna (His Lilas and Teachings) -Swami Sivananda
The Duties of Vanaprasthis and Sannyasins
The Lord said: “He who desires to retire into the forest, should entrust his wife to the care of his son or enter the forest with her and live peacefully in the forest in tranquil meditation spending the third part of his life from 51 to 75.
He should live on roots, fruits and other forest articles of diet and clothe himself with barks, grass or leaves or a deer-skin. He should allow his hair, nails and beard to grow, should bathe thrice a day and lie on the bare ground. [He should not give much attention to the body. He should not think much of body. Then he will have much time to think of Atman].