The column of fire that became a hill
The Skanda Purana tells this story twice in its Arunachala Khanda — once in Brahma's own voice, speaking to his son Sanaka, and once by Nandikeshvara to the sage Markandeya.
The quarrel. Brahma and Vishnu, both born of Sadashiva, fall to arguing over which of them is supreme. Brahma remembers it plainly: each of them claimed to have been born of himself. Ishvara resolves to end the dispute.
The column. A column of fire rises between the two gods, filling the gap between heaven and earth and growing until it pierces the shell of the cosmic egg. Its light turns the mountains, seas, rivers and sky red; even Brahma's body takes on its colour. Yet, the text says, it dazzles without burning. The two gods stop quarrelling and stare at it. A voice declares that whoever finds either end of the column will be counted the greater; in Nandikeshvara's telling it is Vishnu who proposes the contest.
The search. Vishnu takes the form of a huge boar and digs down into the earth for the base. He finds none, tires, and turns to Shiva in humility, praising him as present in fire, wind, sky and the other elements. Brahma takes the form of a swan and flies upward for the top. He wanders for years until his wings fail. Siddhas born of Shiva's splendour rebuke him for his pride, and he comes to see that Shiva is known through grace, not through Vedic learning or austerity.
The hill. The radiance is now a danger. Brahma warns that the earth, scorched by it, will no longer bring forth living beings, and asks Shiva to withhold his splendour and become an immobile linga. Vishnu adds his prayer. Shiva grants it and takes the state of an immovable linga in the form of Arunachala — the hill on the earth's surface. The text calls it Arunachala, Arunadri and Shonashaila, names for the red mountain, and adds that the sun will not pass over its peak while Shiva remains in this form.
What it explains. The episode is why the hill, and not only the linga in the sanctum, is treated as Shiva at Tiruvannamalai. It is also the ground for the walk around the hill: later in the same book, circling Shonachala on foot is taught as a practice that ends rebirth.
Where this account comes from
- Purana: Skanda Purana, Maheshvara Khanda, Arunachala Khanda (Purvardha) 1.23–72 wisdomlib.org
- Purana: Skanda Purana, Maheshvara Khanda, Arunachala Khanda (Purvardha) 2.28–62 wisdomlib.org
- Purana: Skanda Purana, Maheshvara Khanda, Arunachala Khanda (Uttarardha) 10.1–29 wisdomlib.org
- Purana: Skanda Purana, Maheshvara Khanda, Arunachala Khanda (Uttarardha) 14.1–32 wisdomlib.org
- Purana: Skanda Purana, Maheshvara Khanda, Arunachala Khanda (Purvardha) 9.34 wisdomlib.org