<P> Sanatkumara in Sanskrit means "eternal youth". He is the author of the Sanatkumara Samhita, which is part of the Shiva Purana, and has 59 chapters . It is also taken as a part of the Pañcaratra, Vaishnavite devotional texts . </P> <P> The Chandogya Upanishad, Chapter seven, is about Sanatkumara's Instructions on Bhuma - Vidya to celestial sage Narada, Sanatkumara finds mention across Mahabharata, as a great sage, who dispels doubts and the preceptor in all matters affecting Yoga </P> <P> Also mentioned is the Tirtha of Kanakhala near Gangadwara or Haridwar, where through extensive tapas, he attained great ascetic powers . </P> <P> The four Kumaras are the eldest sons of the creator - god Brahma . When Brahma undertook the task of creation of the universe, he first created some beings from different parts of his body to aid him . The Kumaras was the first such beings . They were created from his mind and appeared as infants . Brahma ordered them to aid in creation, but as manifestations of Sattva (purity), and uninterested in worldly life, they refused and instead devoted themselves to God and celibacy, against the wishes of their father . The Bhagavata Purana narrates further that their refusal made Brahma angry and his wrath manifested into the god Rudra, also known as Lord Shiva . As per a variant, Brahma practised austerities (tapas) and pleased the Supreme God Vishnu, so he appeared in the form of the four infant Kumaras as Brahma's sons . Some texts like the Devi Bhagavata Purana and the Bhavishya Purana narrates the four Kumaras appeared even before the Brahma of the present age . (In a cycle of time, some texts say that a Brahma dies and is reborn .) </P>

According to hindu epics which of sages was also known as kumbhasambhava