Sankaracarya, quoted in Hans Hock, Through a glass darkly: Modern racial interpretations vs. textual and general prehistoric evidence on arya and dasa/dasyu in Vedic society. 145-174. Aryan and Non-Aryan in South Asia: Evidence, interpretation, and ideology, Proceedings of the International Seminar on Aryan and Non-Aryan in South Asia, University of Michigan, Ann Arbor, 25-27 October, 1996, ed. by Johannes Bronkhorst and Madhav M. Deshpande. Harvard Oriental Series, Opera Minora, 3. 1999https://en.wikiquote.org/wiki/Elephants