Luke 17:11

Doth he thank that servant because he did the things that were commanded him? I trow not.

So likewise ye, when ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do.

And as he entered into a certain village, there met him ten men that were lepers, which stood afar off:

And they lifted up their voices, and said, Jesus, Master, have mercy on us.