Mbh 13.29.5a

"'"Matanga said, 'Afflicted as I am with grief, why, O Sakra, dost thou afflict me further (with such speeches as these)? Thou art striking one that is already dead, by this behaviour. I do not pity thee for having acquired the status of a Brahmana thou now failest to retain it (for thou hast no compassion to show for one like me). O thou of a hundred sacrifices, the status of a Brahmana as thou sayest be really unattainable by any of the three other orders, yet, men that have succeeded in acquiring (through natural means) that high status do not adhere to it (for what sins do not even Brahmanas commit). Those who having acquired the status of a Brahmana that, like affluence, is so difficult to acquire, do not seek to keep it up (by practising the necessary duties), must be regarded to be the lowest of wretches in this world. Indeed, they are the most sinful of all creatures. Without doubt, the status of a Brahmana is exceedingly difficult to attain, and once being attained, it is difficult to maintain it. It is capable of dispelling every kind of grief. Alas, having attained to it, men do not always seek to keep it up (by practising righteousness and the other duties that attach to it). When even such persons are regarded as Brahmanas why is it that I, who am contented with my own self, who am above all couples of opposites, who am dissociated from all worldly objects, who am observant of the duty of compassion towards all creatures and of self-restraint of conduct, should not be regarded as deserving of that status.[249] How unfortunate I am, O Purandara, that through the fault of my mother I have been reduced to this condition, although I am not unrighteous in my behaviour? Without doubt, Destiny is incapable of being warded off or conquered by individual exertion, since, O lord, I am unable to acquire, notwithstanding these persistent efforts of mine, the object, upon the acquisition of which I have set my heart.