Mahabharata 1.213.64
जन्मप्रभृति कृष्णश्च चक्रे तस्य क्रियाः शुभाःस चापि ववृधे बालः शुक्लपक्षे यथा शशी
janmaprabhṛti kṛṣṇaśca cakre tasya kriyāḥ śubhāḥsa cāpi vavṛdhe bālaḥ śuklapakṣe yathā śaśī
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book