James 2:10

A man who has kept the Law as a whole, but has failed to keep some one command, has become guilty of violating all.

Galatians 3:10

All who are depending upon their own obedience to the Law are under a curse, for it is written, "Cursed is every one who does not remain faithful to all the precepts of the Law, and practise them."

Matthew 5:18-19

Solemnly I tell you that until Heaven and earth pass away, not one iota or smallest detail will pass away from the Law until all has taken place.

Treasury of Scripture Knowledge

Summary

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

Bible References

Whosoever

Matthew 5:18
Solemnly I tell you that until Heaven and earth pass away, not one iota or smallest detail will pass away from the Law until all has taken place.
Galatians 3:10
All who are depending upon their own obedience to the Law are under a curse, for it is written, "Cursed is every one who does not remain faithful to all the precepts of the Law, and practise them."