BG 6.34: The mind is very restless, turbulent, strong and obstinate, O Krishna. It appears to me that it is more difficult to control than the wind.

BG 6.35: Lord Krishna said: O mighty-armed son of Kunti, what you say is correct; the mind is indeed very difficult to restrain. But by practice and detachment, it can be controlled.

 (Yog Darśhan 1.12)[v26]

“The perturbations of the mind can be controlled by constant practice and detachment.”

BG 2.62: While contemplating on the objects of the senses, one develops attachment to them. Attachment leads to desire, and from desire arises anger.

BG 2.63: Anger leads to clouding of judgment, which results in bewilderment of memory. When memory is bewildered, the intellect gets destroyed; and when the intellect is destroyed, one is ruined.

BG 2.64: But one who controls the mind, and is free from attachment and aversion, even while using the objects of the senses, attains the Grace of God.

BG 2.65: By divine grace comes the peace in which all sorrows end, and the intellect of such a person of tranquil mind soon becomes firmly established in God.

BG 2.66: But an undisciplined person, who has not controlled the mind and senses, can neither have a resolute intellect nor steady contemplation on God. For one who never unites the mind with God there is no peace; and how can one who lacks peace be happy?

BG 2.67: Just as a strong wind sweeps a boat off its chartered course on the water, even one of the senses on which the mind focuses can lead the intellect astray.

BG 2.68: Therefore, one who has restrained the senses from their objects, O mighty armed Arjun, is firmly established in transcendental knowledge

Verses taken from @bhagavadgita