In regards to the origin of the Vedas, it is described in "Satapatha Brahmana" that "Rigveda" was received from fire, "Yajurveda" from Vayu, and "Samveda" from Surya. The Vedas are also called "Apaurusheya" because they were not created by man but by God. In the Puranas, 'Mahabharata' is given as the name of the fifth Veda. The subsidiary scriptures of the Vedas are called Vedangas.
The sages are considered to be the seers of the Vedas. The Vedas are eternal, so their light shines only in the consciences of the sages who are in samadhi. In the Vedas, there is an integration of all three meanings: spiritual, physical, and mental.
The Rigveda occupies the first place in Vedic literature. The mantras of Rigveda are called Richa. In Rigveda, despite the abundance of religious content, details of the social, political, economic, and cultural life of human beings then are obtained.
Commentaries on the Rigveda were written by various scholars from time to time. Acharya Sayana, Skandaswami, and Madhavabhata are the main commentators. Later on, Western scholars like Wilson, Max Müller, Ludwig, Griffith, McDonnell, Oldenburg, Grassmann, Luerenu, etc., also edited, translated, and interpreted the Rigveda based on the commentaries of Indian scholars.