Bhagwad Gita
Chapter 6, Verse 28
युञ्जन्नेवं सदाऽऽत्मानं योगी विगतकल्मषः।
सुखेन ब्रह्मसंस्पर्शमत्यन्तं सुखमश्नुते।।6.28।।
Steady in the Self, being freed from all material contamination, the yogi achieves the highest perfectional stage of happiness in touch with the Supreme Consciousness.