Shivapurana 7.2.18.21

Śivapurāṇa (complete text) 7.2.18.21

nivṛttyā śuddhamuddhṛtya śiṣyātmānaṃ yathā purā |
niveśyātmani sūtre ca vāgīśaṃ pūjayettataḥ ||