One verse

Bhagavad Gita 6.35

6.35

श्रीभगवानुवाच | असंशयं महाबाहो मनो दुर्निग्रहं चलम् | अभ्यासेन तु कौन्तेय वैराग्येण च गृह्यते ||६-३५||

śrībhagavānuvāca . asaṃśayaṃ mahābāho mano durnigrahaṃ calam . abhyāsena tu kaunteya vairāgyeṇa ca gṛhyate ||6-35||

śrī-bhagavān uvāca
the Personality of Godhead said
asaṁśayam
undoubtedly
mahā-bāho
O mighty-armed one
manaḥ
the mind
durnigraham
difficult to curb
calam
flickering
abhyāsena
by practice
tu
but
kaunteya
O son of Kuntī
vairāgyeṇa
by detachment
ca
also
gṛhyate
can be so controlled

Lord Śrī Kṛṣṇa said: O mighty-armed son of Kuntī, it is undoubtedly very difficult to curb the restless mind, but it is possible by suitable practice and by detachment.