Bhrigu is a rishi in Hindu tradition. He is one of the seven great sages, the Saptarshis, and one of the many Prajapatis created by Brahma. He was the first compiler of predictive astrology and also the author of Bhrigu Samhita, an astrological (jyotisha) classic. Bhrigu is considered a manasaputra of Brahma. The adjectival form of the name, Bhārgava, is used to refer to the descendants and the school of Bhrigu. According to Manusmriti, Bhrigu was a compatriot and companion of Svāyambhuva Manu, the progenitor of humanity. Along with Manu, Bhrigu made important contributions to the Manusmṛti, which was constituted out of a sermon to a congregation of saints in the state of Brahmavarta, after the great floods in this area. As per the Skanda Purana, Bhrigu migrated to Bhrigukaccha, modern Bharuch, on the banks of the Narmada river in Gujarat, leaving his son Chyavana at Dhosi Hill.