Bhagavad Gita 13.35

क्षेत्रक्षेत्रज्ञ्योरेवमंत्रं ज्ञानचक्षुषा |
भूतप्रकृतिमोक्षं च ये विदुर्यन्ति ते परमं

Translation

Those who perceive with the eyes of knowledge the difference between the body and the knower of the body, and the process of release from material nature, attain the supreme destination.