Bhagwad Gita
Chapter 2, Verse 67
इन्द्रियाणां हि चरतां यन्मनोऽनुविधीयते।
तदस्य हरति प्रज्ञां वायुर्नावमिवाम्भसि।।2.67।।
As a boat on the water is swept away by a strong wind, even one of the senses on which the mind focuses can carry away a man's intelligence.