Bhagavad Gita 9.13

महात्मानस्तु मां पार्थ दैवीं प्रकृतिमाश्रिता: |
भजनत्यन्यामनसो ज्ञात्वा भूतादिमव्ययम्

Translation

But the great souls, who take shelter of My divine energy, O Parth, know Me, Lord Krishna, as the origin of all creation. They engage in My devotion with their minds fixed exclusively on Me.