One day, Ekalavya's focus in training was disturbed by the barking of a dog belonging to the Kuru princes. Ekalavya fired arrows that filled up the dog's mouth without spilling blood or causing injury to the dog. The Kuru princes were amazed by the trick and looked for the archer when they saw Ekalavya, who introduced himself as a pupil of Drona's. This enraged Arjuna, who accused Ekalavya of treachery and demanded Drona to punish him for illegitimate study. Drona was in a tangle: on the one hand, he greatly admired Ekalavya's skill and dedication; on the other hand, Ekalavya had indeed been training as his pupil without his consent, albeit being guided only by his idol. To resolve the matter, Drona accepted Ekalavya as his student, but demanded the thumb on his dominant hand as gurudakshina, or teacher's payment, in order to limit his abilities and further growth in archery, thus pacifying Arjuna. Ekalavya, being an exemplary disciple, immediately cut off his thumb and presented it at Drona's feet. Moved by Ekalavya's sacrifice, Drona blessed him to attain mastery even without his thumb.