<Ul> <Li> Principal Upanishads </Li> <Li> Minor Upanishads </Li> </Ul> <Dl> <Dd> Other scriptures </Dd> </Dl> <Ul> <Li> Bhagavat Gita </Li> <Li> Agama (Hinduism) </Li> </Ul> <Li> Agama (Hinduism) </Li>

Who performed ritual called hiranya garbha and why