Devibhagavatapurana 3.30.41

3.30.41

vyāsa uvāca |
tacchrutvā vacanaṃ satyaṃ matvā rāmaḥ pratāpavān |
kārayitvā śubhaṃ pīṭhaṃ sthāpayitvāmbikāṃ śivām ||

Vyâsa said:-- Then the powerful Bhagavân Hari, hearing all from the Muni, believed them to be true; and, on the approach of the month of Âs’vin, prepared the altar on the top of a hill and placed the Auspicious Goddess, the World Mother and, observing all the rules, performed the vow and worshipped the Goddess.