Sage Vashisht: Vashishtha is one of the oldest and most revered Vedic rishis. He is one of the Saptarishis of India. Vashishtha is credited as the chief author of Mandala 7 of Rigveda. Vashishtha and his family are mentioned in Rigvedic. His ideas have been influential and he was called as the first sage of the Vedanta school of Hindu philosophy by Adi Shankara. Yoga Vashishtha, Vashishtha Samhita, as well as some versions of the Agni Purana and Vishnu Purana are attributed to him. He is the subject of many mythologies, such as him being in possession of the divine cow Kamadhenu and Nandini her child, who could grant anything to their owners. He is famous in Hindu mythologies for his legendary conflicts with sage Vishvamitra. In Ramayana, he was the family priest of Raghu dynasty and teacher of Lord Rama and his brothers.