Shiva Purana
पृथिवीपालको राजा इतरेक्षत्रिया मताः । धान्यादिक्रयवान्वैश्य इतरो वणिगुच्यते ५ ।
A Kṣatriya who rules over a kingdom is a “King”; others are mere Kṣatriyas. A merchant dealing in grains etc. is a Vaiśya and others of his caste are mere “Vaṇiks”
english translation
pRthivIpAlako rAjA itarekSatriyA matAH । dhAnyAdikrayavAnvaizya itaro vaNigucyate 5 ।
hk transliteration by Sanscript