Skandapurana 6.3.197

Chapter 197
Glorious Mārkaṇḍeya said:
Immediately after that, one should go to the unsurpassed Sūryatīrtha, / renowned as Mūlasthāna, auspicious, established by the lotus-born [Brahmā].

The goddess was told by Mūlaśrīpati: 'Install the sun-god.' / Hearing what was spoken by the god, the goddess installed the sun-god.

He is called the Sun known as Mūlasthāna on the bank of the Narmadā.

A person who bathes at that sacred ford with restrained mind, / and satisfies the ancestors and the gods with rice-balls and water,

and then beholds Mūlasthāna, attains the supreme destination. / However, a particular [rule] there, more secret than the secret, has been heard by me,

in an assembly of sages, from Śaṅkara, who bears the crescent moon on his crest: / when the Mūla asterism falls on a Sunday on the bright seventh [tithi],

then, having gone to the water of the Revā, having bathed, and having satisfied the deities / and ancestors, O best of Bharatas, and having given gifts according to one's capacity,

and then, having gone with oleander flowers and red sandalwood water, / having established the sun-god with devotion and worshipped him according to the injunctions,

and then particularly fumigating the lord of the gods of gods / with incenses containing agallochum and olibanum, lighting lamps in the ten directions,

and keeping a vigil while fasting, especially with song and musical instruments— / when this is done, O protector of the earth, one does not partake of terrible suffering.

He dwells in the realm of the Sun for as long as three hundred kalpas, / attended by gandharvas and apsarases, O best of kings.

Thus ends the one hundred and ninety-seventh chapter, named 'Description of the Glory of Mūlasthānatīrtha', in the Revākhaṇḍa of the fifth section, the Āvantyakhaṇḍa, in the glorious Skanda Mahāpurāṇa, a compendium of eighty-one thousand verses.