Devibhagavatapurana 1.2.24

Devībhāgavatapurāṇa 1.2.24

svāyambhuvamukhānāṃ ca manūnāṃ parivarṇanam |
kālasaṅkhyā tathā teṣāṃ tattanmanvantarāṇi ca ||