One of these people is taught humbleness by a butcher in the Vyadha Gita. Tamil communities of these people include the Iyers and Iyengars. Historically, these people were split into seven gotra (15[1])lineages based on their descent from seven rishis. Eight-year-old boys from this (15[1])group become ‘twice born’ by receiving a sacred yellow (15[1])thread in the Upanayana (15[1])ceremony. One of these people called a purohita performs (*) yajna ceremonies by sacrificing offerings to a ritual fire. These people are forbidden from killing animals and traveling overseas. This varna was created from the mouth of Purusha in a hymn from the Vedas, which this caste had a monopoly on teaching. For 10 points, name this priestly caste in Hinduism. ■END■