Mbh 12.51.2a

"'Kesava said, "Are thy perceptions now as clear as before? I hope thy understanding, O foremost of eloquent men, is not clouded. I hope thy limbs are not tortured by the pain arising from the wounds by shafts. From mental grief also the body becomes weak. In consequences of the boon granted to thee by thy sire, the righteous Santanu, thy death, O puissant hero, depends on thy own will. I myself have not that merit in consequence of which thou hast obtained this boon. The minutest pin (inserted) within the body produces pain. What need then be said, O king, of hundreds of arrows that have pierced thee? Surely, pain cannot be said to afflict thee. Thou art competent, O Bharata, to instruct the very gods regarding the origin and dissolution of living creatures. Possessed of great knowledge, everything belonging to the Past, the Future, and the Present, is well known to thee. The dissolution of created beings and the reward of righteousness are well known to thee, O thou of great wisdom, for thou art an ocean of virtue and duty. While living in the enjoyment of swelling sovereignty, I beheld thee forgo female intercourse though sound of limbs and perfectly hale and though surrounded by female companions. Except Santanu's son Bhishma of great energy and firmly devoted to righteousness, possessed of heroism and having virtue for the only object of his pursuit, we have never heard of any other person in the three worlds that could, by his ascetic power, though lying on a bed of arrows and at the point of death, still have such a complete mastery over death (as to keep it thus at bay).