Bhagwad Gita
Chapter 2, Verse 61
तानि सर्वाणि संयम्य युक्त आसीत मत्परः।
वशे हि यस्येन्द्रियाणि तस्य प्रज्ञा प्रतिष्ठिता।।2.61।।
One who restrains his senses and fixes his consciousness upon Me is known as a man of steady intelligence.