Mahabharata 7.8.30

7.8.30

amarṣaṇo marṣitavānkliśyamānaḥ sadā mayā |
anarhamāṇaḥ kaunteyaḥ karmaṇastasya tatphalam || 30 ||

Verily, Partha must have, with his straight shafts, checked all the other car-warriors, and then Prishata's son of sinful deeds must have surrounded Drona. I do not see any other warrior, save the fierce Dhrishtadyumna protected by Arjuna, who could have compassed the death of that mighty hero? It seems that when those heroes, viz., the Kekayas, the Chedis, the Karushas, the Matsyas, and the other kings, surrounding the preceptor, pressed him exceedingly like ants pressing upon a snake, while he was engaged in some difficult feat, the wretched Dhrishtadyumna must have slain him then. This is what, I think. He who, having studied the four Vedas with their branches and the histories forming the fifth (Veda), became the refuge of the Brahmanas, as the ocean is of rivers, that scorcher of foes, who lived both as a Brahmana and as a Kshatriya, alas, how could that Brahmana, reverend in years, meet with his end at the edge of a weapon? Of a proud spirit, he was yet often humiliated and had to suffer, pain on my account. However undeserving of it, he yet attained at the hands of Kunti's son, the fruit of his own conduct. He, upon whose feats depend all wielders of bows in the world, alas, how could that hero, firmly adhering to truth and possessed of great skill, be slain by persons desirous of affluence? Foremost in the world like Sakra himself in heaven, of great might and great energy, alas, how could he be slain by the Parthas, like the whale by the smaller fish?