Maharishi Bhrigu () was one of the seven great sages, the Saptarshis, one of the many Prajapatis (the facilitators of Creation) created by Brahma. The first compiler of predictive astrology, and also the author of "Bhrigu Samhita", the astrological (Jyotish) classic, Bhrigu is considered a "Manasa Putra" ("mind-born-son") of Brahma. The adjectival form of the name, "Bhargava", is used to refer to the descendants and the school of Bhrigu. According to "Manusmriti", Bhrigu was a compatriot of and lived during the time of Manu, the Hindu progenitor of humanity. Bhrigu had his Ashram (Hermitage) on the Vadhusar River, a tributary of the Drishadwati River near Dhosi Hill in the Vedic state of Brahmavarta, presently on the border of Haryana and Rajasthan in India. Along with Manu, Bhrigu had made important contributions to "Manusmriti", which was constituted out of a sermon to a congregation of saints in the state of Brahmavarta, after the great floods in this area, nearly 10,000 years ago.