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 Brahmanas (commentaries on rituals, ceremonies and sacrifices), and the Upanishads (texts discussing meditation, philosophy and spiritual knowledge). Some scholars add a fifth category – the Upasanas (worship). The various Indian philosophies and denominations have taken differing positions on the Vedas. Schools of Indian philosophy which cite the Vedas as their scriptural authority are classified as "orthodox" (āstika). Other śramaṇa traditions, such as Lokayata, Carvaka, Ajivika, Buddhism and Jainism, which did not regard the Vedas as authorities, are referred to as "heterodox" or "non-orthodox" (nāstika) schools. Despite their differences, just like the texts of the śramaṇa traditions, the layers of texts