Mahabharata 1.113.5

तासां व्युच्चरमाणानां कौमारात्सुभगे पतीन्नाधर्मोऽभूद्वरारोहे स हि धर्मः पुराभवत्

tāsāṃ vyuccaramāṇānāṃ kaumārātsubhage patīnnādharmo'bhūdvarārohe sa hi dharmaḥ purābhavat

Our plain-language meaning of this verse is waiting for scholar review.