Luke 17:8-10

and will not rather say unto him, Make ready wherewith I may sup, and gird thyself, and serve me, till I have eaten and drunken; and afterward thou shalt eat and drink? Doth he thank the servant because he did the things that were commanded? Even so ye also, when ye shall have done all the things that are commanded you, say, We are unprofitable servants; we have done that which it was our duty to do.