Mbh 3.71.1b

And repeatedly urged by Rituparna to make haste, Vahuka after much scrutiny and careful deliberation, selected some steeds that were lean-fleshed, yet strong and capable of a long journey and endued with energy and strength of high breed and docility, free from inauspicious marks, with wide nostrils and swelling cheeks, free from faults as regards the ten hairy curls, born in (the country of) Sindhu, and fleet as the winds. And seeing those horses, the king said somewhat angrily, ‘What is this, that thou wishest to do? Thou shouldst not jest with us. How can these horses of mine, weak in strength and breath, carry us? And how shall we be able to go this long way by help of these?’ Vahuka replied, ‘Each of these horses bears one curl on his forehead, two on his temples, four on his sides, four on his chest, and one on his back. Without doubt, these steeds will be able to go to the country of the Vidarbhas. If, O king, thou thinkest of choosing others, point them out and I shall yoke them for thee.’ Rituparna rejoined, ‘O Vahuka, thou art versed in the science of horses and art also skillful (in guiding them). Do thou speedily yoke those that thou thinkest to be able.’ Thereupon the skillful Nala yoked upon the car four excellent steeds of good breed that were, besides, docile and fleet. And after the steeds had been yoked, the king without loss of time mounted upon the car, when those best of horses fell down upon the ground on their knees. Then, O king, that foremost of men, the blessed king Nala began to soothe horses endued with energy and strength. And raising them up with the reins and making the charioteer Varshneya sit on the car, he prepared to set out with great speed. And those best of steeds, duly urged by Vahuka, rose to the sky, confounding the occupant of the vehicle. And beholding those steeds gifted with the speed of the wind thus drawing the car, the blessed king of Ayodhaya was exceedingly amazed.