Bhagavatapurana 6.3.21

6.3.21

dvādaśaite vijānīmo dharmaṃ bhāgavataṃ bhaṭāḥ /
guhyaṃ viśuddhaṃ durbodhaṃ yaṃ jñātvāmṛtamaśnute //

20. & 21. The four-faced Brahma, Narada, Siva, Sanatkumara, Kapila, Manu, Prahladha, king Janaka, Bhishma, Bali, Sukacharya, and we—these twelve know the truth of righteousness ordained by the Supreme Lord, O my servants, not easy to perceive, secret and pure; one who knows it attains to immortal happiness.