Veda is the oldest collection of scriptures of Hinduism and religious texts in an ancient Sanskrit language. There is no definite date as to when the Veda was written, but many scholars believe the period of 1500-1200 BCE is acceptable. It was composed using an advanced poetic technique and an intricate metrical system by the Aryans. The Veda includes four different types of literature: Samhita, Brahmana, Aranyaka and Upanishad. The most important collection is the four Samhitas, which are the basic Vedas.
The earliest is the Rig-Veda, a collection containing 1,028 hymns dedicated to Aryan gods. These Aryan gods were mainly associated with the sky and the atmosphere. The most important ones were Indra, Varuna (the guardian of cosmic order), Agni (the sacrificial fire), and Surya (the Sun). The Rig-Veda is separated into 10 mandalas, or books. Each mandala is formed from a number of hymns and most are entrusted to priestly families. The Rig-Veda also talks about many religious rituals. The main ritual referred to in the collection is located in the 9th mandala, which is the soma sacrifice. Soma was a hallucinogenic juice made from a now unknown plant and it was drunk on some of this rituals.
http://archive.school.eb.com/eb/article-9074939?query=rig%20veda&ct
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http://archive.school.eb.com/eb/article-46842?query=rig%20veda&ct=null
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http://archive.school.eb.com/eb/article-46842?query=rig%20veda&ct=null
Grace Acosta