James 2:10

For anyone who keeps all the law, but makes a slip in one point, is judged to have gone against it all.

Galatians 3:10

For all who are of the works of the law are under a curse: because it is said in the Writings, A curse is on everyone who does not keep on doing all the things which are ordered in the book of the law.

Deuteronomy 27:26

Cursed is he who does not take this law to heart to do it. And let all the people say, So be it.

Matthew 5:18-19

Truly I say to you, Till heaven and earth come to an end, not the smallest letter or part of a letter will in any way be taken from the law, till all things are done.

Treasury of Scripture Knowledge

Summary

For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.

General references

Bible References

Whosoever

Deuteronomy 27:26
Cursed is he who does not take this law to heart to do it. And let all the people say, So be it.
Matthew 5:18
Truly I say to you, Till heaven and earth come to an end, not the smallest letter or part of a letter will in any way be taken from the law, till all things are done.
Galatians 3:10
For all who are of the works of the law are under a curse: because it is said in the Writings, A curse is on everyone who does not keep on doing all the things which are ordered in the book of the law.

General references

Deuteronomy 5:18
Do not be false to the married relation.
Deuteronomy 6:25
And it will be our righteousness if we take care to keep all this order before the Lord our God as he has given it to us.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain