Mbh 10.6.4

"'At last, when all his weapons were exhausted Ashvatthama, casting his eyes around, beheld the whole firmament densely crowded with images of Janardana. Drona's son, divested of weapons, beholding that wonderful sight, recollected the words of Kripa, and turning pale with grief, said, "He that listens not to the beneficial words of advising friends is obliged to repent, being overwhelmed with calamity, even as my foolish self for having disregarded my two well-wishers. That fool who, disregarding the way pointed out by the scriptures, seeketh to slay his enemies, falleth off from the path of righteousness and is lost in the trackless wilderness of sin. One should not cast weapons upon kine, Brahmanas, kings, women, friends, one's own mother, one's own preceptor, a weak man, an idiot, a blind man, a sleeping man, a terrified man, one just arisen from sleep, an intoxicated person, a lunatic and one that is heedless. The preceptors of old always inculcated this truth upon men. I have, however, by disregarding the eternal way pointed out by the scriptures, and by essaying to tread in a wrong path, fallen into terrible distress. The wise have called that to be a terrible calamity when one falls back, through fear, from a great feat after having essayed to achieve it. I am unable, by putting forth only my skill and might, to achieve that which I have vowed.