Bhagavad Gita: Brahman, Adhyatma, Karma (Attaining the Supreme ,Text 3, Chapter 8)
aksaram brahma paramam
svabhavo’ dhyatmam ucyate
(Attaining the Supreme ,Text 3, Chapter 8)
Meaning: The Supreme Personality of Godhead said: The indestructible, transcendental living entity is called Brahman, and his eternal nature is called adhyatma, the self. Action pertaining to the development of the material bodies of the living entities is called karma, or fruitive activities.