Mahabharata 12.320.26

12.320.26

antarhitaḥ prabhāvaṃ tu darśayitvā śukastadā |
guṇānsaṃtyajya śabdādīnpadamadhyagamatparam || 26 ||

Meanwhile Suka, proceeding through that region of the firmament that is above the region of the wind displayed his Yoga-prowess and identified himself with Brahma. Adopting the subtile path of high Yoga, Vyasa of austere penances, reached within the twinkling of the eye that spot whence Suka first undertook his journey. Proceeding along the same way, Vyasa beheld the mountain summit rent in twain and through which Suka has passed. Encountering the Island-born ascetic, the Rishis began to represent to him the achievements of his son. Vyasa, however, began to indulge in lamentations, loudly calling upon his son by name and causing the three worlds to resound with the noise he made. Meanwhile, the righteous-souled Suka, who had entered the elements, had become their soul and acquired omnipresence, answered his sire by uttering the monosyllable Bho in the form of an echo. At this, the entire universe of mobile and immobile creatures, uttering the monosyllable Bho, echoed the answer of Suka. From that time to this, when sounds are uttered in mountain-caves or on mountain-breasts, the latter, as if in answer to Suka still echo them (with the monosyllable Bho). Having cast off all the attributes of sound, etc., and showing his Yoga-prowess in the manner of his disappearance, Suka in this way attained to the highest station. Beholding that glory and puissance of his son of immeasurable energy, Vyasa sat down on the breast of the mountain and began to think of his son with grief.