SB 11.17.48
Devanāgarī
वैश्यवृत्त्या तु राजन्यो जीवेन्मृगययापदि । चरेद् वा विप्ररूपेण न श्ववृत्त्या कथञ्चन ॥ ४८ ॥
Text
vaiśya-vṛttyā tu rājanyo jīven mṛgayayāpadi cared vā vipra-rūpeṇa na śva-vṛttyā kathañcana
Synonyms
vaiśya—of the mercantile class;vṛttyā—by the occupation;tu—indeed;rājanyaḥ—a king;jīvet—may maintain himself;mṛgayayā—by hunting;āpadi—in an emergency or disastrous situation;caret—may act;vā—or;vipra-rūpeṇa—in the form of abrāhmaṇa;na—never;śva—of the dog;vṛttyā—by the profession;kathañcana—in any circumstance.
Translation
A king or other member of the royal order who cannot maintain himself by his normal occupation may act as a vaiśya, may live by hunting or may act as a brāhmaṇa by teaching others Vedic knowledge. But he may not under any circumstances adopt the profession of a śūdra.