Vayupurana 1.8.157

Vāyupurāṇa 1.8.157

upatiṣṭhanti ye tānvai yāvanto nirbhayāstathā.
satyaṃ brahma yathā bhūtaṃ yathā bhūtaṃ bruvanto brāhmaṇāśca te ..156..