Bhagwad Gita
Chapter 13, Verse 3
क्षेत्रज्ञं चापि मां विद्धि सर्वक्षेत्रेषु भारत।
क्षेत्रक्षेत्रज्ञयोर्ज्ञानं यत्तज्ज्ञानं मतं मम।।13.3।।
O scion of Bharat, you should understand that I am also the knower in all bodies, and to understand this body and its owner is called knowledge. That is My opinion.