Shivapurana 5.23.2

Śivapurāṇa (complete text) 5.23.2

śukraśoṇitasaṃyogāddehaḥ sañjāyate yataḥ |
nityaṃ viṇmūtrasampūrṇastenāyamaśuciḥ smṛtaḥ ||