Bhagwad Gita
Chapter 5, Verse 9
प्रलपन्विसृजन्गृह्णन्नुन्मिषन्निमिषन्नपि।
इन्द्रियाणीन्द्रियार्थेषु वर्तन्त इति धारयन्।।5.9।।
Speaking, letting go, seizing, opening, and closing the eyes, one should be convinced that the senses move among the sense-objects.