38
Śrīmad-Bhāgavatam
[Canto 7, Ch. 11]
vaiśyas tu vārtā-vṛttiḥ syān nityaṁ brahma-kulānugaḥ śūdrasya dvija-śuśrūṣā vṛttiś ca svāmino bhavet
vaiśyaḥ —the mercantile community;  tu —indeed;  vārtā-vṛttiḥ —engaged in agriculture, cow protection, and trade;  syāt —must be;  nityaṁ —always;  brahma-kula-anugaḥ —following the directions of the  brāhmaṇas ;  śūdrasya —of the fourth-grade persons, the workers;  dvija-śuśrūṣā —the service of the three higher sections (the  brāhmaṇas ,  kṣatriyas  and  vaiśyas );  vṛttiḥ —means of livelihood;  ca —and;  svāminaḥ —of the master;  bhavet —he must be.
TRANSLATION
The mercantile community should always follow the directions of the  brāhmaṇas  and engage in such occupational duties as agriculture, trade, and protection of cows. For the  śūdras  the only duty is to accept a master from a higher social order and engage in his service.
TEXT 16
वार्ता विचित्रा शास्त्रीनयायावरशिलोञ्छनम् । विप्रवृत्तिश्चतुर्धेयं श्रेयसी चोत्तरोत्तरा ॥१६॥
vārtā vicitrā śālīna- yāyāvara-śiloñchanam vipra-vṛttiś caturdheyaṁ śreyasī cottarottarā
vārtā —the occupational means of livelihood for the  vaiśya  (agriculture, cow protection, and trade);  vicitrā —various types;  śālīna —livelihood achieved without effort;  yāyāvara —going to the field to beg for some paddy;  śila —picking up the grains left in the field by the proprietor;  uñchanam —picking up the grains that have fallen from bags in shops;  vipra-vṛttiḥ —the means of livelihood for the  brāhmaṇas ;  caturdhā —four different kinds;  iyam —this;  śreyasī —better;  ca —also;  uttara-uttarā —the latter compared to the former.