Chapter 6 · verse 15 · gita.yoga.org

Bhagavad Gita 6.15

युञ्जन्नेवं सदाऽऽत्मानं योगी नियतमानसः। शान्तिं निर्वाणपरमां मत्संस्थामधिगच्छति

Thus, always keeping the mind balanced, the yogi, with the mind controlled, attains the peace abiding in Me, culminating in liberation.