Bhagavad Gita 6.27

प्रशांतमनसं ह्येनं योगिनं सुखमुत्तमम् |
उपैति शांतराजसं ब्रह्मभूतमकलमषम्

Translation

Great transcendental happiness comes to the yogi whose mind is calm, whose passions are subdued, who is without sin, and who sees everything in connection with God.