Luke 17:5-10

And the apostles said to the Lord, ‘Add to us faith;’ and the Lord said, ‘If ye had faith as a grain of mustard, ye would have said to this sycamine, Be uprooted, and be planted in the sea, and it would have obeyed you. ‘But, who is he of you — having a servant ploughing or feeding — who, to him having come in out of the field, will say, Having come near, recline at meat? but will not [rather] say to him, Prepare what I may sup, and having girded thyself about, minister to me, till I eat and drink, and after these things thou shalt eat and drink? Hath he favour to that servant because he did the things directed? I think not. ‘So also ye, when ye may have done all the things directed you, say — We are unprofitable servants, because that which we owed to do — we have done.’