Mbh 14.62.1b

He will righteously rule the whole Earth to the verge of the sea. Therefore, O foremost one of Kuru's race, cast off this grief, O mower of foes. Do not doubt this. This will truly happen. That which was uttered by the Vrishni hero on a former occasion, will, without doubt, happen. Do not think otherwise. As regards Abhimanyu, he has gone to the regions of the deities, conquered by him with his own acts. That hero should not be grieved for by thee or, indeed, by the other Kurus." Thus addressed by his grandsire, Dhananjaya of righteous soul, O king, cast off his grief and even became cheerful. Thy sire, O prince, that art conversant with all duties, began to grow in that womb, O thou of great intelligence, like the Moon in the lighted fortnight. Then Vyasa urged the royal son of Dharma for performing the horse-sacrifice. Having said so, he made himself invisible there and then. The intelligent king Yudhishthira the just, hearing the words of Vyasa, set his mind on the journey for bringing wealth (for the sacrifice).'"