Bhagwad Gita
Chapter 6, Verse 15
युञ्जन्नेवं सदाऽऽत्मानं योगी नियतमानसः।
शान्तिं निर्वाणपरमां मत्संस्थामधिगच्छति।।6.15।।
Thus practicing control of the body, mind and activities, the mystic transcendentalist attains to the kingdom of God [or the abode of Krsna] by cessation of material existence.