One verse

Srimad Bhagavatam 7.11.18-20

7.11.18-20

ऋतामृताभ्यां जीवेत मृतेन प्रमृतेन वा । सत्यानृताभ्यामपि वा न श्ववृत्त्या कदाचन ॥ १८ ॥ ऋतमुञ्छशिलं प्रोक्तममृतं यदयाचितम् । मृतं तु नित्ययाच्ञा स्यात्प्रमृतं कर्षणं स्मृतम् ॥ १९ ॥ सत्यानृतं च वाणिज्यं श्ववृत्तिर्नीचसेवनम् । वर्जयेत्तां सदा विप्रो राजन्यश्च जुगुप्सिताम् । सर्ववेदमयो विप्र: सर्वदेवमयो नृप: ॥ २० ॥

rtamrtabhyam jiveta mrtena pramrtena va satyanrtabhyam api va na sva-vrttya kadacana rtam unchasilam proktam amrtam yad ayacitam mrtam tu nitya-yacna syat pramrtam karsanam smrtam satyanrtam ca vanijyam sva-vrttir nica-sevanam varjayet tam sada vipro rajanyas ca jugupsitam sarva-vedamayo viprah sarva-devamayo nrpah

rta-amrtabhyam
of the means of livelihood known as rta and amrta
jiveta
one may live
mrtena
by the profession of mrta
pramrtena va
or by the profession of pramrta
satyanrtabhyam api
even by the profession of satyanrta
va
or
na
never
sva-vrttya
by the profession of the dogs
kadacana
at any time
rtam
rta
unchasilam
the livelihood of collecting grains left in the field or marketplace
proktam
it is said
amrtam
the profession of amrta
yat
which
ayacitam
obtained without begging from anyone else
mrtam
the profession of mrta
tu
but
nitya-yacna
begging grains every day from the farmers
syat
should be
pramrtam
the pramrta means of livelihood
karsanam
tilling the field
smrtam
it is so remembered
satyanrtam
the occupation of satyanrta
ca
and
vanijyam
trade
sva-vrttih
the occupation of the dogs
nica-sevanam
the service of low persons (the vaisyas and sudras)
varjayet
should give up
tam
that (the profession of the dogs)
sada
always
viprah
the brahmana
rajanyah ca
and the ksatriya
jugupsitam
very abominable
sarva-veda-mayah
learned in all the Vedic understandings
viprah
the brahmana
sarva-deva-mayah
the embodiment of all the demigods
nrpah
the ksatriya or king

In time of emergency, one may accept any of the various types of professions known as rta, amrta, mrta, pramrta and satyanrta, but one should not at any time accept the profession of a dog. The profession of unchasila, collecting grains from the field, is called rta. Collecting without begging is called amrta, begging grains is called mrta, tilling the ground is called pramrta, and trade is called satyanrta. Engaging in the service of low-grade persons, however, is called sva-vrtti, the profession of the dogs. Specifically, brahmanas and ksatriyas should not engage in the low and abominable service of sudras. Brahmanas should be well acquainted with all the Vedic knowledge, and ksatriyas should be well acquainted with the worship of demigods.