Bhagavad-gītā 18.45

sveeach his own sveeach his own — each his own; karmaṇiwork — work; abhirataḥfollowing — following; saṁsiddhimperfection — perfection; labhateachieves — achieves; naraḥa man — a man; svain his own duty-karmain his own duty — in his own duty; nirataḥengaged — engaged; siddhimperfection — perfection; yathāas — as; vindatiattains — attains; tatthat — that; śṛṇulisten — listen.