Bhagavad Gita 6.15

युञ्जन्नेवं सदात्मानं योगी नियतमानस: |
शान्तिं निर्वाणपरमां मत्सन्स्तमधिगच्छति

Translation

Thus, constantly keeping the mind absorbed in Me, the yogi of disciplined mind attains nirvāṇ, and abides in Me in supreme peace.