Chapter 2 · verse 61 · gita.yoga.org

Bhagavad Gita 2.61

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

Having restrained them all, he should sit steadfast, intent on Me; his wisdom is steady whose senses are under control.