In the Vedic age the Hindu Vedas were written. According to worldhistory.org, "The Vedas are the religious texts which inform the religion of Hinduism (also known as Sanatan Dharma meaning “Eternal Order” or “Eternal Path”). The term veda means “knowledge” in that they are thought to contain the fundamental knowledge relating to the underlying cause of, function of, and personal response to existence."
The Vedas were a collection of poems and hymns.
"The hymns formed a liturgical body that in part grew up around the soma ritual and sacrifice and were recited or chanted during rituals. They praised a wide pantheon of gods, some of whom personified natural and cosmic phenomena, such as fire (Agni), the Sun (Surya and Savitri), dawn (Ushas, a goddess), storms (the Rudras), and rain (Indra), while others represented abstract qualities such as friendship (Mitra), moral authority (Varuna), kingship (Indra), and speech (Vach, a goddess)." - https://www.britannica.com