The Bhagavad Gītā (18.41) has nature (svabhava) as a distinguishing quality differentiating the varṇā [REF].
Overzee (1992: p. 74) in her work on Pierre Teilhard de Chardin (1881-1955) and Rāmānuja (1017-1137) highlights Rāmānuja's usage of svabhāva in relation to Brahman thus: Let us look more closely at what Rāmānuja means by the Lord's "nature".