Mbh 1.157.5a

“Vaisampayana continued, ‘Then Bhima, expressing his assent to all that Yudhishthira said, addressed Hidimva, saying, ‘Listen to me, O Rakshasa woman! Truly do I make this engagement with thee that I will stay with thee, O thou of slender waist, until thou obtainest a son.’ Then Hidimva, saying, ‘So be it,’ took Bhima upon her body and sped through the sides. On mountain peaks of picturesque scenery and regions sacred to the gods, abounding with dappled herds and echoing with the melodies of feathered tribes, herself assuming the handsomest form decked with every ornament and pouring forth at times mellifluous strains. Hidimva sported with the Pandava and studied to make him happy. So also, in inaccessible regions of forests, and on mountain-breasts overgrown with blossoming trees on lakes resplendent with lotuses and lilies, islands of rivers and their pebbly banks, on sylvan streams with beautiful banks and mountain-currents, in picturesque woods with blossoming trees and creepers in Himalayan bowers, and various caves, on crystal pools smiling with lotuses, on sea-shores shining with gold and pearls, in beautiful towns and fine gardens, in woods sacred to the gods and on hill-sides, in the regions of Guhyakas and ascetics, on the banks of Manasarovara abounding with fruits and flowers of every season Hidimva, assuming the handsomest form, sported with Bhima and studied to make him happy. Endued with the speed of the mind, she sported with Bhima in all these regions, till in time, she conceived and brought forth a mighty son begotten upon her by the Pandava. Of terrible eyes and large mouth and straight arrowy ears, the child was terrible to behold. Of lips brown as copper and sharp teeth and loud roar, of mighty arms and great strength and excessive prowess, this child became a mighty bowman. Of long nose, broad chest, frightfully swelling calves, celerity of motion and excessive strength, he had nothing human in his countenance, though born of man.