Manusmriti

siva.sh/manusmriti/8/418

वैश्यशूद्रौ प्रयत्नेन स्वानि कर्माणि कारयेत् । तौ हि च्युतौ स्वकर्मभ्यः क्षोभयेतामिदं जगत् ॥ ४१८ ॥

sanskrit

(The king) should carefully compel Vaisyas and Sudra to perform the work (prescribed) for them; for if these two (castes) swerved from their duties, they would throw this (whole) world into confusion.

english translation

vaizyazUdrau prayatnena svAni karmANi kArayet | tau hi cyutau svakarmabhyaH kSobhayetAmidaM jagat || 418 ||

hk transliteration by Sanscript