Mahabharata 6.28.35

श्रीभगवानुवाचअसंशयं महाबाहो मनो दुर्निग्रहं चलम्अभ्यासेन तु कौन्तेय वैराग्येण च गृह्यते

śrībhagavānuvācaasaṃśayaṃ mahābāho mano durnigrahaṃ calamabhyāsena tu kaunteya vairāgyeṇa ca gṛhyate

Our plain-language meaning of this verse is waiting for scholar review.