The Great Epic of the Bhārata dynasty 1.52.21

1.52.21

mahākāyā mahāvīryāḥ śailaśṛṅgasamucchrayāḥ |
yojanāyāmavistārā dviyojanasamāyatāḥ || 21 ||

"Many others, of huge bodies, of great speed, tall as mountain summits, of the length of a yama, of a yojana, and of two yojanas, capable of assuming at will any form and of mastering at will any degree of strength, of poison like unto blazing fire, afflicted by the curse of a mother, were burnt in that great 'sacrifice.'"