Verse
धृत्या यया धारयते मनःप्राणेन्द्रियक्रियाः ।योगेनाव्यभिचारिण्या धृतिः सा पार्थ सात्त्विकी ॥
That unwavering persistence by which, through Yoga, One controls the mind, the senses and the life, that persistence, O Partha, is sattwic.
Gītā 18·33