Mbh 8.69.2a

"Sanjaya continued, 'Govinda then said, "Fie, fie," unto Partha and once more continued to say, "I now know, O Partha, that thou hast not waited upon the old, since, O tiger among men, thou hast yielded to wrath at a time when thou shouldst not have done so. No one that is acquainted with the distinctions of morality would act in the way, O Dhananjaya, in which thou, O son of Pandu, that art unacquainted with them, art acting today! He, O Partha, is the worst of men who committeth acts that should not be done and doeth acts that are apparently proper but condemned by the scriptures. Thou knowest not the decisions of those learned men who, waited upon by pupils, declare their opinions, following the dictates of morality. The man that is not acquainted with those rulings becomes confounded and stupefied, O Partha, even as thou hast been stupefied, in discriminating between what should be done and what should not. What should be done and what should not cannot be ascertained easily. Everything can be ascertained by the aid of the scriptures. Thou, however, art not acquainted with the scriptures. Since (believing thyself) conversant with morality, thou art desirous of observing morality (in this way, it seems) thou art actuated by ignorance. Thou believest thyself to be conversant with virtue, but thou dost not know, O Partha, that the slaughter of living creatures is a sin. Abstention from injury to animals is, I think, the highest virtue. One may even speak an untruth, but one should never kill. How then, O foremost of men, couldst thou wish, like an ordinary person, to slay thy eldest brother, the King, who is conversant with morality? The slaughter of a person not engaged in battle, or of a foe, O Bharata who has turned his face from battle or who flies away or seeks protection or joins his hands or yields himself up or is carless, is never applauded by the righteous. All these attributes are in thy superior.