O Uddhava, please tell me, How is Pradyumna, the commander in chief of the Yadus, who was Cupid in a former life? Rukmiṇī bore him as her son from Lord Kṛṣṇa, by the grace of brāhmaṇas whom she pleased.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कच्चिद्वरूथाधिपतिर्यदूनां प्रद्युम्न आस्ते सुखमङ्ग वीरः । यं रुक्मिणी भगवतोऽभिलेभे आराध्य विप्रान् स्मरमादिसर्गे
kaccidvarūthādhipatiryadūnāṃ pradyumna āste sukhamaṅga vīraḥ | yaṃ rukmiṇī bhagavato'bhilebhe ārādhya viprān smaramādisarge
SB 3.1.28