Mbh 1.168.2

“The Brahmana said, ‘At that region where the Ganga entered the plains there lived a great Rishi, devoted to the austerest of penances. Of rigid vows and great wisdom, he bore the name Bharadwaja. One day, on coming to the Ganga to perform his ablutions, the Rishi saw the Apsara Ghritachi, who had come before, standing on the bank after her ablutions were over. And it so happened that a wind arose and disrobed the Apsara standing there. And the Rishi beholding her thus disrobed, felt the influence of desire. Though practising the vow of continence from his very youth, as soon as he felt the influence of desire, the Rishi’s vital fluid came out. And as it came out, he held it in a pot (drana), and of that fluid thus preserved in a pot was born a son who came to be called Drona (the pot-born). And Drona studied all the Vedas and their several branches. And Bharadwaja had a friend named Prishata who was the king of Panchalas. And about the time that Drona was born, Prishata also obtained a son named Drupada. And that bull amongst Kshatriyas, Prishata’s son, going every day to that asylum of Bharadwaja, played and studied with Drona. And after Prishata’s death, Drupada succeeded him on the throne. Drona about this time heard that (the great Brahmana hero) Rama (on the eve of his retiring into the weeds) was resolved to give away all his wealth. Hearing this, the son of Bharadwaja repaired unto Rama who was about to retire into the woods and addressing him, said, ‘O best of Brahmanas, know me to be Drona who hath come to thee to obtain thy wealth.’ Rama replied, saying, ‘I have given away everything. All that I now have is this body of mine and my weapons. O Brahmana, thou mayest ask of me one of these two, either my body or my weapons.’ Then Drona said, ‘It behoveth thee, sir, to give me all thy weapons together with (the mysteries of) their use and withdrawal.’