Mbh 8.91.2e

Indeed, that head abandoned with great unwillingness the body, exceedingly beautiful and always nursed in luxury, of Karna of noble deeds, like an owner abandoning with great unwillingness his commodious mansion filled with great wealth. Cut off with Arjuna's arrow, and deprived of life, the tall trunk of Karna endued with great splendour, with blood issuing from every wound, fell down like the thunder-riven summit of a mountain of red chalk with crimson streams running down its sides after a shower. Then from that body of the fallen Karna a light passing through the welkin penetrated the sun. This wonderful sight, O king, was beheld by the human warriors after the fall of Karna. Then the Pandavas, beholding Karna slain by Phalguna, loudly blew their conchs. Similarly, Krishna and Dhananjaya also, filled with delight, and losing no time, blew their conchs. The Somakas beholding Karna slain and lying on the field, were filled with joy and uttered loud shouts with the other troops (of the Pandava army). In great delight they blew their trumpets and waved their arms and garments. All the warriors, O king, approaching Partha, began to applaud him joyfully. Others, possessed of might, danced, embracing each other, and uttering loud shouts, said, "By good luck, Karna hath been stretched on the earth and mangled with arrows." Indeed, the severed head of Karna looked beautiful like a mountain summit loosened by a tempest, or a quenched fire after the sacrifice is over, or the image of the sun after it has reached the Asta hills. The Karna-sun, with arrows for its rays, after having scorched the hostile army, was at last caused to be set by the mighty Arjuna-time. As the Sun, while proceeding towards the Asta hills, retires taking away with him all his rays, even so that shaft (of Arjuna) passed out, taking with it Karna's life breaths. The death hour of the Suta's son, O sire, was the afternoon of that day.