" A hymn in this text is the first source for the Pururavas and Urvashi story.
In a commentary on this text, Sayana developed an accurate estimate of the speed of light. Its tenth section contains a poem stating that neither being nor non-being existed before creation. Section 3.62.10 of this text, which contains the Nasadiya sukta, consists of a prayer beginning "om bhur bhuvah svah." A hymn in this text is the first source for the Pururavas and Urvashi story. The Gayatri Mantra is found in this text, which is divided into ten mandalas, with one dedicated to soma. Consisting of hymns to Agni and Indra and named for the "wisdom of the verses," for 10 points, identify this oldest Hindu sacred text, the earliest of the four Vedas.
In a commentary on this text, Sayana developed an accurate estimate of the speed of light.
{Rigveda} [or the Wisdom of the Verses before mentioned]