Mbh 6.19.2c

Causing those kings to move and make space for him, that mighty car-warrior Dhrishtadyumna, accompanied by his brothers and sons protected Yudhishthira from behind. Transcending the huge standards on all the cars on thy side and that of the enemy, was the one gigantic ape on Arjuna’s car. Foot-soldiers, by many hundreds of thousands, and armed with swords, spears, and scimitars, proceeded ahead for protecting Bhimasena. And ten thousand elephants with (temporal) juice trickling down their cheek and mouth, and resembling (on that account) showering clouds,[106] endued with great courage, blazing with golden armour, huge hills, costly, and emitting the fragrance of lotuses, followed the king behind like moving mountains.[107] And the high-souled and invincible Bhimasena, whirling his fierce mace that resembled a parigha[108] seemed to crush the large army (of thy son). Incapable of being looked at like the Sun himself, and scorching as it were, the hostile army (like fire), none of the combatants could bear to even look at him from any near point. And this array, fearless and having its face turned towards all sides called Vajra, having bows for its lightning sign,[109] and extremely fierce, was protected by the wielder of Gandiva. Disposing their troops in this counter-array against thy army, the Pandavas waited for battle. And protected by the Pandavas, that array became invincible in the world of men.