Bhagwad Gita
Chapter 10, Verse 7
एतां विभूतिं योगं च मम यो वेत्ति तत्त्वतः।
सोऽविकम्पेन योगेन युज्यते नात्र संशयः।।10.7।।
He who knows in truth this glory and power of Mine engages in unalloyed devotional service; of this there is no doubt.