Mahabharata 8.1.37

भार्गवः प्रददौ यस्मै परमास्त्रं महात्मनेसाक्षाद्रामेण यो बाल्ये धनुर्वेद उपाकृतः

bhārgavaḥ pradadau yasmai paramāstraṃ mahātmanesākṣādrāmeṇa yo bālye dhanurveda upākṛtaḥ

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