Brahmanda Purana

[4] It is among the oldest Puranas, the earliest core of text maybe from 4th century CE, continuously edited thereafter over time and it exist in numerous versions.

[5] The Brahmanda Purana manuscripts are encyclopedic in their coverage, covering topics such as Cosmogony, Sanskara (Rite Of Passage), Genealogy, chapters on ethics and duties (Dharma), Yoga, geography, rivers, good government, administration, diplomacy, trade, festivals, a travel guide to places such as Kashmir, Cuttack, Kanchipuram, and other topics.

[11][12] The text is generally assumed, states Ludo Rocher, to have achieved its current structure about 1000 CE.

[13] The Adhyatma-Ramayana, the most important embedded set of chapters in the extant versions of the Purana, is considered to have been composed centuries later, possibly in the 15th century, and is attributed to Ramananda – the Advaita scholar and the founder of the Ramanandi Sampradaya, the largest monastic group in Hinduism and in Asia in modern times.

[15][16] A Javanese Brahmanda palm-leaf manuscript was discovered in Indonesia in the mid-19th century by colonial-era Dutch scholars, along with other Puranas.

This suggests that older versions of the Indian text may have been smaller, in a different style, and without prophecy-related sections, although tradition informs the opposite (an even larger source).

[1][5] It is non-sectarian and reveres all gods and goddesses, including Brahma, Vishnu, Shiva, Ganesha, Surya and Shakti.

[2] This part is written as a dialogue between Hayagriva and sage Agastya on Lalita's emergence out of fire after which the king of gods Indra worshipped Devi (the goddess representing the Supreme Reality).

[5] The sections of this Purana include: The Adhyatma Ramayana, a text consisting about 4,500 verses in 65 chapters and divided into seven Kandas (books).