Mbh 12.199.31a

"'"The Brahmana said, 'I will not accept any other utterance (from thee). I have given thee the fruits of my recitations. Let, O royal sage, both thy words and mine become true. As regards my recitations, I never cherished any specific desire to accomplish. How then, O tiger among kings, should I have any knowledge of what the fruits are of those recitations? Thou saidst, "Give!" I said "I give!" I shall not falsify these words. Keep the truth. Be calm! If thou request to keep my word, O king, great will be thy sin due to falsehood. O chastiser of foes, it does not become thee to utter what is untrue. Similarly, I dare not falsify what I have uttered. I have, before this, unhesitatingly said, "I give!" If, therefore, thou art firm in truth, accept my gift. Coming here, O king, thou didst solicit of me the fruits of my recitations. Therefore, take what I have given away, if, indeed, thou art firm in truth. He who is addicted to falsehood has neither this world nor the next. Such a person fails to rescue his (deceased) ancestors. How again shall he succeed in doing good to his (unborn) progeny? The rewards of sacrifices and gifts, as also of fasts and religious observances, are not so efficacious in rescuing (a person from evil and hell) as Truth, O bull among men, in both this and the next world. All the penances that have been undergone by thee and all those that thou wilt undergo in the future for hundreds and thousands of years do not possess efficacy greater than that of Truth. Truth is one undeteriorating Brahma. Truth is the one undeteriorating Penance. Truth is the one undeteriorating sacrifice. Truth is the one undeteriorating Veda. Truth is awake in the Vedas. The fruits attached to Truth have been said to be the highest. From Truth arise Righteousness and Self-restraint. Everything rests on Truth. Truth is the Vedas and their branches. Truth is Knowledge. Truth is the Ordinance. Truth is the observance of vows and fasts. Truth is the Primeval Word Om.