Brihadaaranyak Upanishad - 5-1
Yaagyavalkya and Maitreyee-1 Part 2, Ch 4; and
Yaagyavalkya and Maitreyee-2, Part 4, Ch 5 - both are the same. Why?
1. Om. Infinite is That Brahm, infinite in this manifested universe. From the
Infinite Brahm proceeds the infinite. After the realization of the Great Identity
or after the cosmic dissolution, when the infinity of the infinite universe merges
in the Infinite Brahm, there remains the Infinite Brahm alone. Om is the Aakaash
Brahm - the primeval Aakaash. It is the Aakaash containing air, says the son of
Kauravayarn. It (Om) is the Ved - thus the knowers of Brahm know; for through it
one knows what is to he known.
Once the Angels, the Humans and the Asur - the three children of Brahmaa lived
with him as his students. After they completed their studies, Prajaapati gave
them the last lesson, so he told the Angels the syllable "Da" (pronounced
as in Divya) and asked - "Did you understand?" The Angels answered
"Yes, Sir, we did. You told us "Daamyat" , means exercise self-control
Prajaapati said, "Yes, You have understood it."
Then he talked to Humans, and he told the same syllable "Da" to them too
and asked - "Did you understand?"
The Humans replied, "Yes, Sir. We have understood. You told us "Datt",
means "be charitable" (Daan).
"Yes," said Prajaapati, "You have understood."
Then he talked to Asur. He told the same syllable "Da" to them too and
asked them - "Did you understand?"
They replied - "Yes, Sir. We did understand. You told us "Dayadhwam",
means "Be kind (compassionate)" (Dayaa)."
"Yes, You have understood."
The Divine voice of thunder repeats "Da, Da, Da" and asks us everyone to
exercise self-control (Dam), to do charity (Daan), and to be kind (Dayaa).