Mbh 6.78.1a

Sanjaya said, “Then king Duryodhana, regaining his senses, once more began to resist Bhima with showers of arrows. And once more those mighty car-warriors viz., thy sons, united together, began to fight valiantly with Bhimasena. And Bhimasena also of mighty arms during that battle, having got his car, ascended it and proceeded to the spot where thy sons were. And taking up a strong and very tough bow adorned with gold and capable of taking the lives of foes he pierced thy sons in that conflict, with his shafts. Then king Duryodhana struck the mighty Bhimasena at the very vitals with a long shaft of exceeding sharpness. Then that mighty bowman, pierced thus deeply by thy son, bow in hand, forcibly drawing his own with eyes red in wrath, struck Duryodhana in his two arms and the breast with three shafts. But struck thus, O king, he moved not, like a prince of mountains. Beholding then those two heroes excited with rage and smiting each other, the younger brothers of Duryodhana, all of whom were heroes prepared to lay down their lives, remembering their previously formed scheme of afflicting Vrikodara of terrible deeds, set about firmly resolved, for smiting him down. And as they fell upon him in battle, Bhimasena of great strength rushed against them, O king, like an elephant rushing against an attacking compeer. Excited with fury and endued with great energy, that celebrated hero then, O king, afflicted thy son Chitrasena with a long arrow. And as regards thy other sons, that descendant of Bharata smote them all in that battle, with diverse kinds of shafts furnished with wings of gold and endued with great impetus. Then king Yudhishthira the just, disposing all his own divisions properly despatched twelve mighty car-warriors including Abhimanyu and others to follow Bhimasena behind. Those, O king, all proceeded against those mighty car-warriors, viz., thy sons.