Mbh 13.29.4

"'"Sakra said, 'It seems, O Matanga, that the status of a Brahmana which thou seekest is ill-suited to thee. That status is incapable of being attained by thee. Verily, in thy case, it is surrounded by many dangers. A person by worshipping a Brahmana obtains happiness; while by abstaining from such worship, he obtains grief and misery. The Brahmana is, with respect to all creatures, the giver of what they prize or covet and the protector of what they already have. It is through the Brahmanas that the Pitris and the deities become gratified. The Brahmana, O Matanga, is said to be foremost of all created Beings. The Brahmana grants all objects that are desired and in the way they are desired.[248] Wandering through innumerable orders of Being and undergoing repeated rebirths, one succeeds in some subsequent birth in acquiring the status of a Brahmana. That status is really incapable of being obtained by persons of uncleansed souls. Do thou, therefore, give up the idea. Do thou name some other boon. The particular boon which thou seekest is incapable of being granted to thee.'