Mahabharata 9.50.4

जनमेजय उवाच · janamejaya uvāca

कथं द्वादशवार्षिक्यामनावृष्ट्यां तपोधनःवेदानध्यापयामास पुरा सारस्वतो मुनिः

kathaṃ dvādaśavārṣikyāmanāvṛṣṭyāṃ tapodhanaḥvedānadhyāpayāmāsa purā sārasvato muniḥ

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