Bhagavad Gita 2.67

As a ship at sea is tossed by the tempest, so the reason is carried away by the mind when preyed upon by straying senses.

इन्द्रियाणां हि चरतां यन्मनोऽनुविधीयते।
तदस्य हरति प्रज्ञां वायुर्नावमिवाम्भसि॥

indriyāṇāṃ hi caratāṃ yanmano'nuvidhīyate|
tadasya harati prajñāṃ vāyurnāvamivāmbhasi||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).