[2] Vānaprastha is part of the Vedic ashrama system, which starts when a person hands over household responsibilities to the next generation, takes an advisory role, and gradually withdraws from the world.
[11] Vānaprastha represented the third stage and typically marked with birth of grandchildren, gradual transition of householder responsibilities to the next generation, increasingly hermit-like lifestyle, and greater emphasis on community services and spiritual pursuit.
[4] Dhavamony[13] identifies Vānaprastha stage as one of "detachment and increasing seclusion" but usually serving as a counselor, peace-maker, judge, teacher to young and advisor to the middle-aged.
[12] Jamison and Witzel state[14] early Vedic texts make no mention of life in retirement, or Vānaprastha, or Ashrama system, unlike the concepts of Brahmacharin and Grihasthi which can be distinguished.
[15] The earliest mention of a related concept in Rig Veda is of Antigriha (अन्तिगृह, like a neighbor) in hymn 10.95.4, where the context and content suggests the elders did not go into forest, but continued to live as part of extended family, with outwardly role, in ancient India.
The concept of Vānaprastha, and Sannyasa, emerged about or after 7th century BCE, when sages such as Yājñavalkya left their homes and roamed around as spiritual recluses and pursued their Pravrajika (homeless) lifestyle.
[16] The Dharmasūtras and Dharmaśāstras, composed about mid 1st millennium BCE and later, place increasing emphasis on all four stages of Ashrama system, including Vānaprastha.
That king who engages in battle with the resolve of protecting his kingdom or meeting with death, attains to the object of the Vanaprastha mode of life.Markandeya Purana suggests that a householder, after he has taken care of his progeny, his parents, his traditions and cleansed his mind is ready to enter the third stage of life, or Vānaprastha.
[24] Narada Parivrajaka Upanishad identifies four characteristics of a Vānaprastha stage of life as Audumbara (threshold of house, woods), Vaikhanasa (anchorite), Samprakshali (cleansing rituals) and Purnamanasa (contented mind).