givers, such as Angirasa , Apasthambha , Atri , Bhrigu , Brihaspati , Boudhayana , Daksha , Gautama , Harita , Katyayana , Likhita , Manu , [ 31 ] Parasara , Samvarta , Shankha , Shatatapa , Ushanasa , Vashishta , Vishnu , Vyasa , Yajnavalkya and Yama . These