Bhagavad Gita 2.53

श्रुतिविप्रतिपन्न ते यदा स्थास्यति निश्चला |
समाधावचला बुद्धिस्तदा योगमवाप्स्यसि

Translation

When your intellect ceases to be allured by the fruitive sections of the Vedas and remains steadfast in divine consciousness, you will then attain the state of perfect Yog.