Bhagavatapurana 11.23.45

11.23.45

dānaṃ sva-dharmo niyamo yamaś ca śrutaṃ ca karmāṇi ca sad-vratāni /
sarve mano-nigraha-lakṣaṇāntāḥ paro hi yogo manasaḥ samādhiḥ //

46. Charitable gifts, the duties of his own Varna and Asrama, Niyamas and Yamas, the study of the Vedas, various acts enjoined therein and the good observances as fasting on Ekadasi,—all find their use in governing the mind; for to keep the mind in a balanced state is the highest form of Yoga.