Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Atma-Samyama Yoga Chapter 6, Verse 6.18.
Sanskrit
यदा विनियतं चित्तमात्मन्येवावतिष्ठते । निःस्पृहः सर्वकामेभ्यो युक्त इत्युच्यते तदा ॥ ६.१८ ॥
Hindi
अत्यन्त वशमें किया हुआ चित्त जिस कालमें परमात्मामें ही भलीभाँति स्थित हो जाता है, उस कालमें सम्पूर्ण भोगोंसे स्पृहारहित पुरुष योगयुक्त है, ऐसा कहा जाता है|
English
When one has freed himself of all desires, he will then always be firmly established in Yoga. When one has full control of his mind, he will be fully established in God.