Mbh 12.54.4

"'Bhishma said, "Burning, stupefaction, fatigue, exhaustion, illness, and pain, through thy grace, O thou of Vrishni's race, have all left me in a single day. O thou of incomparable splendour, all that is past, all that is future, and all that is present, I behold as clearly as a fruit placed in my hands. All the duties declared in the Vedas, all those laid down in the Vedantas, I behold clearly, O thou of unfading glory, in consequence of the boon thou hast granted to me. The duties that have been declared by persons of learning and righteous behaviour, dwell in my remembrance. I am conversant also, O Janardana, with the duties and practices prevailing in particular countries and among particular tribes and families. Everything relating again to the four modes of life has come back to my recollection. I am acquainted also, O Kesava, with the duties that relate to king-craft. Whatever should at whatever time be said, I would say, O Janardana! Through thy grace, I have acquired an auspicious understanding. Strengthened by meditation on thee, I feel as if I have become a young man again. Through thy favour, O Janardana, I have become competent to discourse on what is beneficial (for the world). Why, however, O holy one, dost thou not thyself discourse to Pandu's son upon all that is good? What explanation hast thou to give in respect of this? Tell me quickly, O Madhava!"