Arunachala - from Skanda Purana - Arunachala Mahatmya
Arunachala from Skanda Purana - Arunachala Mahatmya:
Skanda Purana (Maheshwara Khanda - Arunachala Mahatmya 1): Shiva manifesting as Taijasha Linga: Once Brahma and Vishnu were fighting with each other, each asserting that he is primordial. Since their fight could destroy the universe, Lord Shiva manifested in the form of a Taijasha Linga (an infinite column of Fire) before them. An ethereal voice challenged them to find the beginning and end of the column of fire to prove their superiority. Vishnu took the form of a boar and started digging through the earth to find the root of the column. Brahma took the form of a swan and ascended in the sky to find the head of the column. Many many years passed but neither of them were able to find the source. They became utterly exhausted and realised their arrogance. They understood that Shiva is the eternal Atman which is the source of all creation. The sages realize Shiva by giving up their ego and meditating on the Atman.
Skanda Purana (Maheshwara Khanda - Arunachala Mahatmya 2): Shiva assuming the form of Arunachala mountain: Brahma and Vishnu then praised Lord Shiva (Who was in the form of the Infinite Taijasha Linga). Shiva became pleased and told them to ask for a boon. They requested Shiva to manifest in a visible form so that devas, siddhas, ordinary human beings and others could worship Him and become blessed. Shiva granted the boon and manifested as Sona-Shaila, the great Arunachala mountain.
Om, May there be Peace in Heaven,
May there be Peace in the Sky,
May there be Peace in the Earth,
May there be Peace in the Water,
May there be Peace in the Plants,
May there be Peace in the Trees,
May there be Peace in the Gods in the various Worlds,
May there be Peace in Brahman,
May there be Peace in All,
May there be Peace Indeed within Peace,
Giving Me the Peace which Grows within Me,
Om, Peace, Peace, Peace.