The threefold descendants of Pragapati, gods, men, and Asuras (evil spirits), dwelt as; Brahmakarins (students) with their father Pragapati. Having finished their studentship the gods said: 'Tell us (something), Sir.' He told them the syllable Da. Then he said: 'Did you understand?' They said: 'We did understand. You told us "Damyata," Be subdued.' 'Yes,' he said, 'you have understood.'

In plain words: The gods, humans and demons all studied under their father Prajapati, the creator. When the gods asked for a final teaching, he said only 'Da.' The gods understood it as 'Damyata,' meaning 'control yourselves,' and he agreed.