Mbh 3.85.2c

One should proceed next to the forest of Tungaka, with subdued senses and leading a Brahmacharya mode of life It was here that in olden days Muni Saraswata taught the Vedas to the ascetics. When the Vedas had been lost (in consequence of the Munis having forgotten them), Angirasa’s son, seated at ease on the upper garments of the Munis (duly spread out), pronounced distinctly and with emphasis the syllable Om. And at this, the ascetics again recollected all that they had learnt before. It was there that the Rishis and the gods Varuna, Agni, Prajapati, Narayana also called Hari, Mahadeva and the illustrious Grandsire of great splendour, appointed the resplendent Bhrigu to officiate at a sacrifice. Gratifying Agni by libations of clarified butter poured according to the ordinance, the illustrious Bhrigu once performed the Agnyadhana sacrifice for all those Rishis, after which both they and the gods went away to their respective homes one after another. One who enters the forest of Tungaka, is, O best of kings, male or female, cleansed of every sin. There in that tirtha, O hero, one should reside for a month, with subdued senses and regulated diet. By this, O king, one ascendeth to the region of Brahma, and delivereth also his race. Arriving next at Medhavika, one should offer oblations of water to the gods and the Pitris. By this, one acquires the merit of the Agnishtoma sacrifice, and also memory and intellect. There in that tirtha is the mountain known over the whole world and called Kalanjara. Bathing in the celestial lake that is there, one acquires the merit of giving away a thousand kine. He that, O king, after a bath, offereth oblations (to the gods and the Pitris) on the Kalanjara mountain, is, without doubt, regarded in heaven.