Shruti or Shruthi (Sanskrit: श्रुति; IAST: "Śruti"; IPA/Sanskrit: [ʃrut̪i]) in Sanskrit means "that which is heard" These ancient religious texts comprising the central canon of Hinduism includes the four Vedas including its four types of attached texts - the Samhitas, the Brahmanas, the Aranyakas and the early Upanishads