Divine Manifestation & Primary Origin Narrative (Teaching of the Vedas)
According to the ancient Sthala Puranam, the four Vedas (Rig, Yajur, Sama, and Atharva) personified themselves and performed intense penance on the banks of the Cheyyaru River to comprehend the ultimate esoteric truth behind their mantras. Moved by their sincere devotion, Lord Shiva manifested as a radiant Swayambhu Lingam beneath a Palmyra Palm tree (Panai Maram) and taught (Othuthal in Tamil) the inner core of divine knowledge to the Vedas. Because the Lord imparted Vedic wisdom here, the presiding deity assumed the sacred name Sri Vedapureeswarar ("The Lord of the Abode of Vedas"), and the surrounding town came to be known as Thiruvothur (derived from Othuthal, meaning the place of sacred teaching).
Saint Thirugnanasambandar's Male Palmyra Palm Miracle (Aan Panai Miracle)
The most celebrated miracle recorded in the annals of Shaivism occurred at Thiruvothur during the 7th century CE. A devout Shaivite follower named Thondar planted numerous Palmyra palm trees (Panai Maram) around the temple to supply palm leaves and palm oil for sacred temple rituals and daily lamps. However, to the dismay of the local townspeople and the taunts of rival sects, every single planted palm tree grew into a male Palmyra tree (Aan Panai), which naturally yields no fruit. The opponents mocked the devotee, declaring that his God Shiva was powerless to yield fruit from male trees.
Deeply distressed, the devotee appealed to Saint Thirugnanasambandar during his pilgrimage to Thiruvothur. Sambandar stood before the sanctum, looked upon the row of barren male palm trees, and composed his immortal Tevaram decad beginning with the verse "Poompugaluru". As he sang the 10th verse, a divine miracle occurred before the eyes of thousands: all the male Palmyra palm trees instantly transformed into fruit-bearing female palm trees (Penn Panai), loaded with ripe, sweet palm fruit (Nongu). This legendary miracle proved the omnipresent power of Lord Shiva and converted many to the Shaivite fold. To this day, a preserved male Palmyra palm tree (Aan Panai Maram) stands inside the temple prakaram as a living memorial of Sambandar's miracle.
Creation of Cheyyaru River by Lord Murugan
Another profound legend links the temple to Lord Murugan (Cey). When Lord Murugan needed holy water to perform daily Abhishekam for His father Lord Vedapureeswarar, He struck the earth with His divine spear (Vel). A surging holy river sprang forth from the strike, which came to be known as Cheyyaru (the river created by Cey / Murugan). The riverbank remains a revered site for ancestral rites and ceremonial holy dips.