Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 13.42

13.42

kāpilaṃ prathamaṃ viddhi prājāpatyaṃ dvitīyakam /
brāhmaṃ saumyaṃ ca sāvitraṃ bārhaspatyaṃ prabhāsakam //

Know the Kāpila to be the first, the Prājāpatya the second, / the Brāhma, Saumya, Sāvitra, Bārhaspatya, and Prabhāsaka;