NT.filter - strkjv duty:

strkjv@Luke:17:10 @ So likewise ye, when ye shall have done (5661) all those things which are commanded (5685) you, say (5720), We are (5748) unprofitable servants: we have done (5658) that which was our duty (5707) to do (5758).

strkjv@Romans:15:27 @ It hath pleased them (5656) verily; and their debtors they are (5748). For if the Gentiles have been made partakers (5656) of their spiritual things, their duty is (5719) also to minister (5658) unto them in carnal things.