Mahabharata 1.102.13

क्रियमाणेषु कृत्येषु कुमाराणां महात्मनाम्पौरजानपदाः सर्वे बभूवुः सततोत्सवाः

kriyamāṇeṣu kṛtyeṣu kumārāṇāṃ mahātmanāmpaurajānapadāḥ sarve babhūvuḥ satatotsavāḥ

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