Matsyapurana 83.40

83.40

svamantreṇaiva sarveṣu homaḥ śaileṣu paṭhyate
upavāsī bhavennityam aśakte naktamiṣyate //

This is the way of the worship of all the hills. The same mantras and materials for worship should be employed in worshipping them all. The sacrificial offerings to the different asterisms, Lokapâlas, Brahmâ and other Devas should also be offered by applying their respective mantras. Diurnal fasts should be observed. In case the devotee cannot do so, he may take his meals in the night. O Nârada ! Now listen to the Dâna mantras of all hills serially.—38-40.