As per Hindu legend, when time came to destroy the world and finish the yuga, Brahma was worried a lot. He pleaded Vishnu to tell him a way to keep the tools necessary for Srishti and all vedas safely. Vishnu ordered him to put all these things in a strong mud pot and after trying mud from all places Brahma finally made a pot out of the sand taken from Thirucherai and saved all Vedas and all necessary aids for creation. Hence as this placed gave the magical mud which held a lead role this place became the reason for all living things to live even after the Maha pralaya so this place is called Sara Shetram.