Mbh 6.62.2d

And Bhimasena, the son of Pandu, having penetrated that elephant division, began to wander over the field, crushing those beasts around him like Indra himself crushing the mountains. And we beheld elephants slain in that battle by Bhimasena, each with only one stroke (of his mace), like hills riven by thunder. And many elephants, huge as hills, were slain there, having their tusks broken or temples, or bones, or backs, or frontal globes. And others, O king, deprived of life, lay there with foaming mouths. And many mighty elephants, with frontal globes completely smashed, vomited large quantities of blood. And some, from fear, laid themselves down on the ground like (so many) hillocks. And smeared with the fat and blood (of elephants) and almost bathed in their marrow, Bhima wandered over the field like the Destroyer himself, club in hand. And Vrikodara, whirling that mace of his which was wet with the blood of elephants, became terrible and awful to behold, like the wielder of Pinaka armed with Pinaka.[381] And those huge tuskers, while (thus) crushed by the angry Bhima, suddenly fled away, afflicted, crushing thy own ranks. And these mighty bowmen and car-warriors, headed by Subhadra’s son (all the while) protected that battling hero whirling his gory mace[382] wet with the blood of elephants, like the celestials protecting the wielder of the thunder-bolt. Of terrible soul, Bhimasena then looked like the Destroyer himself. Indeed, O Bharata, putting forth his strength on all sides, mace in arms, we beheld Bhimasena then to resemble Sankara himself dancing (at the end of the Yuga), and his fierce, heavy, and sounding mace to resemble the club of Yama and possessed of the sound of Indra’s bolt. And that gory mace of his, smeared with marrow and hair, resembled (also) the angry Rudra’s Pinaka while he is engaged in destroying all creatures. As a herdsman chastises his herd of cattle with a goad, so did Bhima smite that elephant division with that mace of his.