Bhagavad Gita 6.37
अर्जुन उवाच। अयतिः श्रद्धयोपेतो योगाच्चलितमानसः। अप्राप्य योगसंसिद्धिं कां गतिं कृष्ण गच्छति।।6.37।।
arjuna uvāca| ayatiḥ śraddhayopeto yogāccalitamānasaḥ| aprāpya yogasaṃsiddhiṃ kāṃ gatiṃ kṛṣṇa gacchati||6.37||
arjuna uvaca ayatih shraddhayopeto yogaccalitamanasah aprapya yogasamsiddhim kam gatim krishna gacchati6.37
Meaning
Arjuna asks: What happens to a person who has faith but fails to achieve perfection in yoga? Does such a person, falling from both paths, perish like a scattered cloud?
अर्जुन बोले — हे कृष्ण! जिसका मन योग से च्युत हो गया है, ऐसा श्रद्धायुक्त किन्तु अपूर्ण प्रयत्न वाला साधक योगसिद्धि न पाकर किस गति को प्राप्त होता है?
This is verse 37 of 47 in Chapter 6 (Dhyana Yoga) of the Bhagavad Gita.