text: In the Rigveda, Prajapati appears as an epithet for Savitr, Soma, Agni and Indra, who are all praised as equal, same and lord of creatures. Elsewhere, in hymn 10.121 of the Rigveda, is described Hiranyagarbha (golden embryo) that was born from the waters containing everything, which produced Prajapati. It then created manas (mind), kama (desire) and tapas (heat). However this Prajapati is a metaphor, one of many Hindu cosmology theories, and there is no supreme deity in the Rigveda. One of the striking features about the Hindu Prajapati myths, states Jan Gonda, is the idea that work of creation is a gradual process, completed in stages of trial and improvement.
  In the Shatapatha Brahmana, embedded inside the Yajurveda, Prajapati emanated from Purusha (cosmic spirit) and Prajapati co-creates the world with Vāc It also includes the "golden cosmic egg" mythology, wherein Prajapati is stated to be born from a golden egg in primeval sea after the egg was incubated for a year. His sounds became the sky, the earth and the seasons. When he inhaled, he created the devas, fire, and light. When he exhaled, he created the asuras, and darkness. Then, together with Vāc , he created all beings and time. In Chapter 10 of the Shatapatha Brahmana, as well as chapter 13 of Pancavimsa Brahmana, is presented another myth wherein he, Prajapati is a mother, who becomes self-pregnant with all living creatures self-generated, then Mrtyu seizes these beings within his/her womb, but because these beings are part of the eternal Prajapati they desire to live long like him.