Mbh 13.162.6

"'Bhishma said, "Righteousness is sometimes seen to be destroyed by wicked wights of great power. If thou thinkest, O king, that Righteousness should really be of three kinds, my reply is that thy conclusion is warranted by reason. The truth is that Righteousness is one and indivisible, although it is capable of being viewed from three different points. The paths (indications) of those three that constitute the foundation of Righteousness have each been laid down. Do thou act according to the instructions laid down. Thou shouldst never wrangle about Righteousness and then seek to have those doubts solved into which thou mayst arrive. O chief of the Bharatas, let no doubts like these ever take possession of thy mind! Do thou obey what I say without scruple of any kind. Follow me like a blind man or like one who, without being possessed of sense himself, has to depend upon that of another. Abstention from injury, truth, absence of wrath (or forgiveness), and liberality of gifts,--these four, O king, that hast no foe, do thou practise, for these four constitute eternal Righteousness! Do thou also, O mighty-armed prince, pursue that conduct towards the Brahmanas which is consistent with what has been observed towards them by thy sires and grandsires. These are the principal indications of Righteousness. That man of little intelligence who would destroy the weight of authority by denying that to be a standard which has always been accepted as such would himself fail to become an authority among men. Such a man becomes the cause of much grief in the world. Do thou reverence the Brahmanas and treat them with hospitality. Do thou always serve them in this way. The universe rests on them. Do thou understand them to be such!"