Shivapurana 3.37.23

Śivapurāṇa (complete text) 3.37.23

pañcākṣaraṃ japanmantraṃ śivapremasamākulaḥ |
tejasāṃ ca svayaṃrāśiḥ sākṣāddharma ivāparaḥ ||