One verse

Srimad Bhagavatam 11.18.18

11.18.18

भिक्षां चतुर्षु वर्णेषु विगर्ह्यान् वर्जयंश्चरेत् । सप्तागारानसङ्‍क्लृप्तांस्तुष्येल्ल‍ब्धेन तावता ॥ १८ ॥

bhikṣāṁ caturṣu varṇeṣu vigarhyān varjayaṁś caret saptāgārān asaṅkḷptāṁs tuṣyel labdhena tāvatā

bhikṣām
charity obtained by begging
caturṣu
among the four
varṇeṣu
occupational divisions of society
vigarhyān
abominable, impure
varjayan
rejecting
caret
one should approach
sapta
seven
āgārān
houses
asaṅkḷptān
without calculation or desire
tuṣyet
one should be satisfied
labdhena
with that obtained
tāvatā
with just that amount

Rejecting those houses that are polluted and untouchable, one should approach without previous calculation seven houses and be satisfied with that which is obtained there by begging. According to necessity, one may approach each of the four occupational orders of society.