Bhagavad Gita 2.68

Therefore, O Mighty-Armed One, he whose senses are detached from their objects—take it that his reason is purified.

तस्माद्यस्य महाबाहो निगृहीतानि सर्वशः।
इन्द्रियाणीन्द्रियार्थेभ्यस्तस्य प्रज्ञा प्रतिष्ठिता॥

tasmādyasya mahābāho nigṛhītāni sarvaśaḥ|
indriyāṇīndriyārthebhyastasya prajñā pratiṣṭhitā||

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