Bhagavad Gita · 2.61

तानि सर्वाणि संयम्य युक्त आसीत मत्परः।वशे हि यस्येन्द्रियाणि तस्य प्रज्ञा प्रतिष्ठिता॥

tāni sarvāṇi saṁyamya yukta āsīta mat-paraḥ vaśhe hi yasyendriyāṇi tasya prajñā pratiṣhṭhitā

Having restrained all the senses, one should sit in meditation, focused on Me. One whose senses are under control has steady wisdom.

— Bhagavad Gita 2.61

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)