What Krsna has to say about Brahmanas

At this time, Lord Krsna was present among His relatives who were
members of the ksatriya class. To teach them through the exemplary
character of King Nrga, He said: "Even though a ksatriya king may be as
powerful as fire, it is not possible for him to usurp the property of a
brahmana and utilize it for his own purpose. If this is so, how can
ordinary kings, who falsely think themselves the most powerful beings
within the material world, usurp a brahmana's property? I do not think
that taking poison is as dangerous as taking a brahmana's property. For
ordinary poison there is treatment--one can be relieved from its
effects--but if one drinks the poison of taking a brahmanas property,
there is no remedy for the mistake. The perfect example was King Nrga.
He was very powerful and very pious, but due to the small mistake of
unknowingly usurping a brahmana's cow, he was condemned to the
abominable life of a lizard. Ordinary poison affects only those who
drink it, and ordinary fire can be extinguished simply by pouring water
on it; but the arani fire ignited by the spiritual potency of a brahmana
can burn to ashes the whole family of a person who provokes such a
brahmana. [Formerly, the brahmanas used to ignite the fire of sacrifice
not with matches or any other external fire but with their powerful
mantras, called arani.] If someone even touches a brahmana's property,
he is ruined for three generations. However, if a brahmana's property is
forcibly taken away, the taker's family for ten generations before him
and ten generations after will be subject to ruination. On the other
hand, if someone becomes a Vaisnava, or devotee of the Lord, ten
generations of his family before his birth and ten generations after
will be liberated."
Lord Krsna continued: "If some foolish king who is puffed up by his
wealth, prestige and power wants to usurp a brahmana's property, he
should be understood to be clearing his path to hell; he does not know
how much he has to suffer for such an unwise act. If someone takes away
the property of a very liberal brahmana who is encumbered by a large
dependent family, then such a usurper is put into the hell known as
Kumbhipaka; not only is he put into this hell, but his family members
also have to accept such a miserable condition of life. A person who
takes away property which has either been awarded to a brahmana or given
away by him is condemned to live for at least sixty thousand years as
miserably as an insect in stool. Therefore I instruct you, all My boys
and relatives present here, do not, even by mistake, take the possession
of a brahmana and thereby pollute your whole family. If someone even
wishes to possess such property, let alone attempts to take it away by
force, the duration of his life will be reduced. He will be defeated by
his enemies, and after being bereft of his royal position, when he gives
up his body he will become a serpent, giving trouble to all other living
entities. My dear boys and relatives, I therefore advise you that even
if a brahmana becomes angry with you and calls you by ill names or cuts
you, still you should not retaliate. On the contrary, you should smile,
tolerate him and offer your respects to the brahmana. You know very well
that even I Myself offer My obeisances to the brahmanas with great
respect three times daily. You should therefore follow My instruction
and example. I shall not forgive anyone who does not follow them, and I
shall punish him. You should learn from the example of King Nrga that
even if someone unknowingly usurps the property of a brahmana, he is put
into a miserable condition of life."
Thus Lord Krsna, who is always engaged in purifying the conditioned
living entities, gave instruction not only to His family members and the
inhabitants of Dvaraka, but to all the members of human society. After
this, the Lord entered His palace.

From Krsna Book Chapter 63 "The Story of King Nrga"