Mbh 12.336.4b

In the place of that illustrious king, many foremost Brahmanas, well conversant with the Pancharatra ritual, used to eat before all others the food offered to the god Narayana. As long as that slayer of foes continued to rule his kingdom righteously, no untruth ever escaped his lips and no evil thought ever entered his mind. With his limbs he never committed even the slightest sin. The seven celebrated Rishis, viz., Marichi, Atri, Angiras, Pulastya, Pulaha, Kratu, and Vasishta of great energy, who came to be known by the name of Chitra-sikhandins, uniting together on the breast of that foremost of mountains, viz., Meru, promulgated an excellent treatise on duties and observances that was consistent with the four Vedas. The contents of that treatise were uttered by seven mouths, and constituted the best compendium of human duties and observances. Known, as already stated, by the name of Chitra-sikhandins, those seven Rishis constitute the seven (Pravriti) elements (of Mahat, Ahankara, etc.) and the Selfborn Manu, who is the eighth in the enumeration, constituted original Prakriti. These eight uphold the universe, and it was these eight that promulgated the treatise adverted to. With their senses and minds under complete control, and ever devoted to Yoga, these eight ascetics, with concentrated souls, are fully conversant with the Past, the Present and the Future, and are devoted to the religion of Truth.--This is good this is Brahma,--this is highly beneficial,--reflecting in their minds in this way, those Rishis created the worlds, and the science of morality and duty that governs those worlds. In that treatise the authors discoursed on Religion and Wealth and Pleasure, and subsequently on Emancipation also. They also laid down in it the various restrictions and limitations intended for the Earth as also for Heaven.