Manusmriti
स्वधर्मो विजयस्तस्य नाहवे स्यात् पराङ्मुखः । शस्त्रेण वैश्यान् रक्षित्वा धर्म्यमाहारयेद् बलिम् ॥ ११९ ॥
His peculiar duty is conquest, and he must not turn back in danger; having protected the Vaisyas by his weapons, he may cause the legal tax to be collected;
english translation
svadharmo vijayastasya nAhave syAt parAGmukhaH । zastreNa vaizyAn rakSitvA dharmyamAhArayed balim ॥ 119 ॥
hk transliteration by Sanscript