Bhagavad Gita 2.53
श्रुतिविप्रतिपन्ना ते यदा स्थास्यति निश्चला। समाधावचला बुद्धिस्तदा योगमवाप्स्यसि।।2.53।।
śrutivipratipannā te yadā sthāsyati niścalā| samādhāvacalā buddhistadā yogamavāpsyasi||2.53||
shrutivipratipanna te yada sthasyati nishcala samadhavacala buddhistada yogamavapsyasi2.53
Meaning
When your intellect, confused by hearing various doctrines, becomes firmly established and unwavering in divine consciousness, you shall attain the state of perfect Yoga.
जब अनेक वचनों से विचलित तेरी बुद्धि परमात्मा में अचल और स्थिर हो जाएगी, तब तू योग को प्राप्त हो जाएगा।
This is verse 53 of 72 in Chapter 2 (Sankhya Yoga) of the Bhagavad Gita.