Chapter 2 · verse 67 · gita.yoga.org

Bhagavad Gita 2.67

इन्द्रियाणां हि चरतां यन्मनोऽनुविधीयते। तदस्य हरति प्रज्ञां वायुर्नावमिवाम्भसि

For the mind, which follows in the wake of the wandering senses, carries away his discrimination, as the wind carries away a boat on the waters.