Rig Veda

The Rigveda (Sanskrit: ऋग्वेद ṛgveda, from ṛc "praise, shine" and veda "knowledge") is an ancient Indian collection of Vedic Sanskrit hymns. It is one of the four canonical sacred texts (śruti) of Hinduism known as the Vedas. The text is a collection of 1,028 hymns and 10,600 verses, organized into ten books (Mandalas).[4] The hymns are dedicated to Rigvedic deities.
Begins with a small book addressed to deity Agni, Indra and other gods, all arranged according to decreasing total number of hymns in each deity collection; for each deity series the hymns progress from longer to shorter ones; yet, the number of hymns per book increases; finally, the meter is systematically arranged from jagati and tristubh to anustubh and gayatri as the text progresses.[2] In terms of substance, the hymns predominantly discuss cosmology and praise deities in the earliest composed eight books, shifting in books 1 and 10, that were added last, to philosophical or speculative[6] questions about the origin of the universe and the nature of god, the virtue of Dāna (charity) in society, and other metaphysical issues in its hymns.