Historical Vedic religion the Vedic period, composed in Vedic Sanskrit, are mainly the four Vedic Samhitas, but the Brahmanas, Aranyakas and some of the older Upanishads (Bṛhadāraṇyaka, Chāndogya, Jaiminiya Upanishad Brahmana) are also placed in this period. The Vedas record the liturgy connected with the rituals and sacrifices. These texts are also considered as a part of the scripture of contemporary Hinduism. Specific rituals and sacrifices of the Vedic religion include, among others: The Hindu rites of cremation are seen since the Rigvedic period; while they are attested from early times in the Cemetery H culture, there is a late Rigvedic reference invoking
Vedas period, giving rise to various recensions of the text. Some texts were revised into the modern era, raising significant debate on parts of the text which are believed to have been corrupted at a later date. The Vedas each have an Index or Anukramani, the principal work of this kind being the general Index or "". Prodigious energy was expended by ancient Indian culture in ensuring that these texts were transmitted from generation to generation with inordinate fidelity. For example, memorization of the sacred "Vedas" included up to eleven forms of recitation of the same text. The texts were subsequently