Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 4
Sanskrit:
स्वप्ने यथा शिरश्छेदं पञ्चत्वाद्यात्मन: स्वयम् ।यस्मात् पश्यति देहस्य तत आत्मा ह्यजोऽमर: ॥ ४ ॥
ITRANS:
svapne yathā śiraś-chedaṁpañcatvādy ātmanaḥ svayamyasmāt paśyati dehasyatata ātmā hy ajo ’maraḥ
Translation:
In a dream one can see his own head being cut off and thus understand that his actual self is standing apart from the dream experience. Similarly, while awake one can see that his body is a product of the five material elements. Therefore it is to be understood that the actual self, the soul, is distinct from the body it observes and is unborn and immortal.