Mahabharata 3.197.35

3.197.35

yo'dhyāpayedadhīyīta yajedvā yājayīta vā |
dadyādvāpi yathāśakti taṃ devā brāhmaṇaṃ viduḥ || 35 ||

The gods know him for a Brahmana who, cognisant of morals and endued with mental energy, is catholic in religion and looketh upon all equal unto himself. The gods know him for a Brahmana who studieth himself and teacheth others, who performeth sacrifices himself and officiateth at the sacrifices of others, and who giveth away to the best of his means. The gods know that bull among the regenerate ones for a Brahmana who, endued with liberality of soul, practiseth the Brahmacharya vow and is devoted to study,--in fact who is vigilantly devoted to the study of the Vedas. Whatever conduceth to the happiness of the Brahmanas is always recited before these. Ever taking pleasure in truth, the hearts of such men never find joy in untruth. O thou best of regenerate ones, it hath been said that the study of the Vedas, tranquillity of soul, simplicity of behaviour, and repression of the senses, constitute the eternal duties of the Brahmana. Those cognisant with virtue and morals have said that truth and honesty are the highest virtue. Virtue that is eternal is difficult of being understood. But whatever it is, it is based on truth. The ancients have declared that virtue dependeth on sruti. But, O foremost of regenerate ones, virtue as exposed in sruti appears to be of various kinds. It is, therefore, too subtle of comprehension. Thou, O holy one, art cognisant of virtue, pure, and devoted to the study of the Vedas.