Bhagavad Gita 15.4

तत: पदं तत्परिमार्गितव्यं यस्मिन्गता न निवर्तन्ति भूय: |
तमेव चाद्यं पुरुषं प्रपद्ये यत्: संकट: प्रसृता पुराणि

Translation

Then one must search out the base of the tree, which is the Supreme Lord, from whom streamed forth the activity of the universe a long time ago. Upon taking refuge in Him, one will not return to this world again.