Jñāneśvarī (commentary on the Bhagavadgītā) 6.418

6.418

śrībhagavān uvāca
asaṃśayaṃ mahābāho mano durnigrahaṃ calam
abhyāsena tu kaunteya vairāgyeṇa ca gṛhyate
taṃva kṛṣṇa mhaṇatī sācaci |
bolata āhāsi teṃ taiseṃci |
yayā manācā kīra capaḷaci |
svabhāvo gā ||

Then Kṛṣṇa said: "What you say is indeed true; such indeed is the restless nature of this mind, O friend!