Shivapurana 7.2.19.23

Śivapurāṇa (complete text) 7.2.19.23

itthaṃ bhaktyā śivaṃ śaivo yaḥ sādhayati sādhakaḥ |
tasyehāmutra duṣprāpaṃ na kiñcidapi vidyate ||