Luke 17:11 Meaning

9Doth he thank that servant because he did the things that were commanded him? I trow not.

10So 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.

11And it came to pass, as he went to Jerusalem, that he passed through the midst of Samaria and Galilee.

12And as he entered into a certain village, there met him ten men that were lepers, which stood afar off:

13And they lifted up their voices, and said, Jesus, Master, have mercy on us.