Mahabharata Bhishma Parva Chapter 43:3

Mahabharata Bhishma Parva (Bhagavat-Gita Parva) Chapter 43:3 Bhishma said, 'O king, O son of Kuru's race, what aid can I render thee in this? I shall, of course, fight for (thy) foes. Tell me what thou hast to say. Yudhishthira said, 'Therefore, O Sire, I ask thee, I bow to thee, O grandsire, how shall we, in battle, vanquish thee that art invincible? Tell me this that is for my benefit, if indeed, thou seest any good in it. Bhishma said, 'I do not, O son of Kunti, see the person who, even if he were the chief of the celestials himself, can defeat me in battle when I fight. Yudhishthira said, 'My salutations to thee, O grandsire. Therefore, do I ask thee (this). Tell us how thy own death may be compassed by foes in battle. Bhishma said, 'I do not see the person, O sire, who can vanquish me in battle. The time also of my death is not yet come to me once again. Sanjaya continued,—"Then, O son of Kuru's race, Yudhishthira, once more saluting him, accepted Bhishma's words with a bend of his head. And that mighty-armed one then proceeded towards the car of the preceptor (Drona) through the midst of all the soldiers who were eyeing him, accompanied by his brothers. Then saluting Drona and walking round him, the king spoke to that invincible warrior words that were for his own benefit. Yudhishthira said, 'I ask thee, O invincible one, how I may fight without incurring sin, and how, with thy permission, O regenerate one, I may vanquish all my foes?