Making that Dhananjaya was superior to every one in the science of arms, Karna one day approached Drona privately and said these words to him,-I desire to master the Brahma weapon, with all its Mantras and the power of withdrawing it, for I wish to fight Arjuna.
वीर्याधिकमथालक्ष्य धनुर्वेदे धनंजयम्। द्रोणं रहस्युपागम्य कर्णो वचनमब्रवीत्॥ ब्रह्मास्त्रं वेत्तुमिच्छामि सरहस्यनिवर्तनम्। अर्जुनेन समं चाहं युध्येयमिति मे मतिः॥