Manusmriti
यैः कर्मभिः प्रचरितैः शुश्रूष्यन्ते द्विजातयः । तानि कारुककर्माणि शिल्पानि विविधानि च ॥ १०० ॥
(Let him follow) those mechanical occupations and those various practical arts by following which the twice-born are (best) served.
english translation
yaiH karmabhiH pracaritaiH zuzrUSyante dvijAtayaH । tAni kArukakarmANi zilpAni vividhAni ca ॥ 100 ॥
hk transliteration by Sanscript