Obviously, you have the Vedas, which are very ancient. Even these epics, their events might have taken place 3,000 years ago or maybe more. Their composition was over 2,000 years ago. They were canonized during the Gupta Empire. But there's many other texts. You have things that are believed written during the Vedic period, the Vedanga, which relate to things like medicine and astronomy. You have commentaries on things like the Upanishads, things like the Brahma Sutra.