Mbh 3.311.1c

Who, therefore, save Yama himself who in due time bringeth about the end of all things, could have baffled them thus.’ And having concluded this for certain, he began to perform his ablutions in that lake. And while he descended into it, he heard these words from the sky, uttered by the Yaksha,--‘I am a crane, living on tiny fish. It is by me that thy younger brothers have been brought under the sway of the lord of departed spirits. If, thou, O prince, answer not the questions put by me, even thou shalt number the fifth corpse. Do not, O child, act rashly! This lake hath already been in my possession. Having answered my questions first, do thou, O Kunti’s son, drink and carry away (as much as thou requirest)!’ Hearing these words, Yudhishthira said, ‘Art thou the foremost of the Rudras, or of the Vasus, or of the Marutas? I ask, what god art thou? This could not have been done by a bird! Who is it that hath overthrown the four mighty mountains, viz., the Himavat, the Paripatra, the Vindhya, and the Malaya? Great is the feat done by thee, thou foremost of strong persons! Those whom neither gods, nor Gandharvas nor Asuras, nor Rakshasas could endure in mighty conflict, have been slain by thee! Therefore, exceedingly wonderful is the deed done by thee! I do not know what thy business may be, nor do I know thy purpose. Therefore, great is the curiosity and fear also that have taken possession of me? My mind is greatly agitated, and as my head also is aching, I ask thee, therefore, O worshipful one, who art thou that stayest here?’ Hearing these words the Yaksha said, ‘I am, good betide thee, a Yaksha, and not an amphibious bird. It is by me that all these brothers of thine, endued with mighty prowess, have been slain!’