Shivapurana 2.3.13.13

Śivapurāṇa (complete text) 2.3.13.13

yacchṛṇoṣi yadaśnāsi yatpaśyasi karoṣi yat |
tatsarvaṃ prakṛteḥ kāryaṃ mithyāvādo nirarthakaḥ ||