Bhagavad Gita 6.35
श्री भगवानुवाच
असंशयं महाबाहो मनो दुर्निग्रहं चलं।
अभ्यासेन तु कौन्तेय वैराग्येण च गृह्यते।।6.35।।
Shri bhagavanuvacha
Asanshayam mahabaho mano durnigraham chalam
Abhyasena tu kaunteya vairagyena cha grihyate
Simple meaning, written by AIThe Blessed Lord said: O mighty-armed, it is certainly true that the mind is hard to restrain and is restless. But, O Kaunteya, it is brought under control through practice and detachment.