Śruti (श्रुित}}, ("what is heard") is a canon of Hindu sacred texts. They do not date to a particular period, but rather stretch across the entire history of Hinduism, beginning with the some of the earliest known Hindu texts, spanning into the modern period with the Upanishads. Śruti has no author; rather, it is divine recording of the "cosmic sounds of truth", heard by rishis (saints or sages).