Shivapurana 5.35.23

Śivapurāṇa (complete text) 5.35.23

tadvākyaṃ bhavitā satyaṃ tvaṃ ca trātau bhaviṣyasi |
kuru tāta na sandehaṃ manaścāśvāsya svaṃ prabho ||