Purva-vibhaga Chapter 28 Verse 63

नार्जुनेन समः शंभोर्भक्त्या भूतो भविष्यति। मुक्त्वा सत्यवतीसूनुं कृष्णं वा देवकीसुतम।।

nārjunena samaḥ śaṃbhorbhaktyā bhūto bhaviṣyati| muktvā satyavatīsūnuṃ kṛṣṇaṃ vā devakīsutam||