Luke 17:10

So also ye, when ye have done all things commanded you, say, We are unprofitable servants: for we have but done what was our duty to do.

Matthew 25:30

And cast the unprofitable servant into the outer darkness: there shall be weeping and gnashing of teeth.

Romans 11:35

Or who hath first given unto him, and it shall be repaid him again?

Matthew 25:37-40

Then shall the righteous answer him, saying, Lord, when saw we thee hungry, and fed thee? or thirsty, and gave thee drink?

Romans 3:12

All are turned aside together, they are become worthless; there is none that doeth good, there is not even one.

1 Corinthians 9:16-17

For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me, yea verily woe is to me if I preach not the gospel.

1 Corinthians 15:9-10

For I am the least of the apostles, who am not meet to be called an apostle, because I persecuted the church of God.

Philippians 3:8-9

Yea doubtless, and I count all things but loss for the transcendently excellent knowledge of Jesus Christ my Lord: for whom I have suffered the loss of all things, and count them but as offals of ordure, that I may gain Christ,

1 Peter 5:5-6

In like manner, ye who are younger persons, be in subjection to your elders: but all of you be subject one to another, and be clothed from head to foot with humility: for God sets himself in opposition to the proud, but he giveth grace to the lowly.

Treasury of Scripture Knowledge

Summary

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.

Bible References

General references

Matthew 25:30
And cast the unprofitable servant into the outer darkness: there shall be weeping and gnashing of teeth.
Romans 3:12
All are turned aside together, they are become worthless; there is none that doeth good, there is not even one.
Romans 11:35
Or who hath first given unto him, and it shall be repaid him again?
1 Corinthians 9:16
For though I preach the gospel, I have nothing to glory of: for necessity is laid upon me, yea verily woe is to me if I preach not the gospel.
1 Corinthians 15:9
For I am the least of the apostles, who am not meet to be called an apostle, because I persecuted the church of God.
Philippians 3:8
Yea doubtless, and I count all things but loss for the transcendently excellent knowledge of Jesus Christ my Lord: for whom I have suffered the loss of all things, and count them but as offals of ordure, that I may gain Christ,
Philemon 1:11
who in time past hath been an unprofitable servant to thee, but now very profitable to thee and to me:
1 Peter 5:5
In like manner, ye who are younger persons, be in subjection to your elders: but all of you be subject one to another, and be clothed from head to foot with humility: for God sets himself in opposition to the proud, but he giveth grace to the lowly.