Romans 3:20

This is because no human being can be considered right with God by [obeying] the requirements of a law. [Note: It is difficult to determine the exact sense in which "law" is used in these verses. It may be law generally, or the law of Moses specifically. See Bruce, pages 52-58]. For the knowledge of what sin is comes from the law of Moses.

Romans 7:9

And I was [once] alive before being aware of the law [i.e., complacent and without a sense of guilt]; but when [awareness of] the commandment [not to sin] came, sin sprang to life,

2 Corinthians 7:9-11

Now I am glad, not because you were made sorry, but because your sorrow led you to repent. For you were made sorry from a godly motive, so were not harmed by us in any way.

Treasury of Scripture Knowledge

Summary

And Nehemiah, which is the Tirshatha, and Ezra the priest the scribe, and the Levites that taught the people, said unto all the people, This day is holy unto the LORD your God; mourn not, nor weep. For all the people wept, when they heard the words of the law.

Bible References

All the people

Romans 3:20
This is because no human being can be considered right with God by [obeying] the requirements of a law. [Note: It is difficult to determine the exact sense in which "law" is used in these verses. It may be law generally, or the law of Moses specifically. See Bruce, pages 52-58]. For the knowledge of what sin is comes from the law of Moses.
Romans 7:9
And I was [once] alive before being aware of the law [i.e., complacent and without a sense of guilt]; but when [awareness of] the commandment [not to sin] came, sin sprang to life,
2 Corinthians 7:9
Now I am glad, not because you were made sorry, but because your sorrow led you to repent. For you were made sorry from a godly motive, so were not harmed by us in any way.