Mbh 7.124.3b

Then the son of Bharadwaja, by means of his shafts, despatched those brave warriors struggling vigorously in battle, especially those foremost ones among the Chedis, into the presence of the King of the dead. After those foremost ones among the Chedis had been exterminated, the Panchalas, afflicted with the shafts of Drona, began to tremble. Beholding, O sire, those feats of Drona, they loudly called after Bhimasena and Dhrishtadyumna, O Bharata, and said, “This Brahmana hath, without doubt, practised the austerest of penances and acquired great ascetic merit. Inflamed with rage in battle, he consumeth the foremost of Kshatriyas. A Kshatriya’s duty is battle; a Brahmana’s, the highest asceticism. A Brahmana endued with ascetic merit and learning, is capable of burning everything by his glances only. Many foremost of Kshatriyas, having approached the uncrossable and fierce fire of Drona’s weapons, have, O Bharata, been blasted and consumed. The illustrious Drona, to the measure of his might, courage, and perseverance, stupefies all creatures and slays our troops!” Hearing these words of theirs, the mighty Kshatradharman, rightly observant of the duties of a Kshatriya, wrathfully cut off with a crescent-shaped arrow the bow of Drona with arrow fixed thereon. Then Drona, that grinder of Kshatriyas, becoming more angry still, took up another bright bow, tougher than the one he had laid aside. Fixing on it a keen arrow, destructive of hostile ranks, the preceptor, endued with great strength, sped it at the prince, drawing the bowstring to his ear. That arrow, slaying Kshatradharman entered the earth. His breast pierced through, he fell down from his vehicle on the earth. Upon the slaughter of Dhrishtadyumna’s son, the (Pandava) troops began to tremble. Then the mighty Chekitana fell upon Drona, Piercing Drona with ten arrows, he once more pierced him with a shaft in the centre of his chest.