Shivapurana 7.2.16.2_2

Śivapurāṇa (complete text) 7.2.16.2_2

sampūjyāmantrakaṃ bhaktyā śivaṃ paramakāraṇam |
taistaiḥ pāpaiḥ pramucyeta varṣairdvādaśabhiḥ kramāt ||