Mahabharata 7.20.32

7.20.32

kavacormidhvajāvartāṃ martyakūlāpahāriṇīm |
gajavājimahāgrāhāmasimīnāṃ durāsadām || 32 ||

Endued with great activity and slaughtering the foe ceaselessly, the twang of the bow-string, as he stretched his bow, was heard in all directions. Fierce arrows shot by that warrior endued with great lightness of hand, crushed elephants and steeds and foot-soldiers and car-warriors and elephant-riders. As a mighty mass of roaring clouds in summer with violent winds (blowing) poureth a shower of hail-stones, so did Drona pour his arrowy showers and inspired fear in the hearts of his foes. That mighty hero, that great bowman, that dispeller of the fears of his friends, careered in all directions (of the field) agitating the (hostile) host. The bow, decked with gold, of Drona of immeasurable energy, was seen in all directions like the flashes of lightning in the clouds. The beautiful altar on his banner, as he careered in battle, O Bharata, was seen to resemble a crest or Himavat. The slaughter that Drona caused among the Pandava troops was very great, resembling that caused by Vishnu himself, the adored of both the gods and Asuras, among the Daitya host. Heroic, truthful in speech, endued with great wisdom and might, and possessed of prowess incapable of being baffled, the illustrious Drona caused a river to flow there that was fierce and capable of striking the timid with fear. Coats of mail formed its waves, and standards its eddies. And it carried away (as it ran) large numbers of mortal creatures.

And elephants and steeds constituted its great alligators, and swords formed its fishes. And it was incapable of being easily crossed over. The bones of brave warriors formed its pebbles, and drums and cymbals its tortoises. And shields and armour formed its boats, and the hair of warriors its floating moss and weeds. And arrows constituted its wavelets and bows its current. And the arms of the combatants formed its snakes. And that river of fierce current, running over the field of battle, bore away both the Kurus and the Srinjayas. And the heads of human beings, constituted its stones, and their thighs its fishes. And maces constituted the rafts (by which many sought to cross it). And head-gears formed the forth that covered its surface, and the entrails (of animals) its reptiles. Awful (in mien), it bore away heroes (to the other world). And blood and flesh constituted its mire. And elephants formed its crocodiles, and standards, the trees (on its banks). Thousands of Kshatriyas sank in it. Fierce, clogged (dead) bodies, and having horse-soldiers and elephant-warriors for its sharks, it was extremely difficult to cross it. And that river ran towards the abode of Yama. And it abounded with Rakshasas and dogs and jackals. And it v as haunted by fierce cannibals all around.