James 2:10

For whoever keeps the whole law, and stumbles on one, he has become guilty of all.

Galatians 3:10

For as many as are from works of law are under a curse, for it is written, Cursed is every man who does not continue in all things written in the book of the law, to do them.

Deuteronomy 27:26

Cursed is {every man who does not continue in all (LXX/NT)} the words of this law to do them. And all the people shall say, Amen.

Matthew 5:18-19

For truly I say to you, until the heaven and the earth pass away, one iota or one tittle will, no, not pass away from the law, until all things come to pass.

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 {every man who does not continue in all (LXX/NT)} the words of this law to do them. And all the people shall say, Amen.
Matthew 5:18
For truly I say to you, until the heaven and the earth pass away, one iota or one tittle will, no, not pass away from the law, until all things come to pass.
Galatians 3:10
For as many as are from works of law are under a curse, for it is written, Cursed is every man who does not continue in all things written in the book of the law, to do them.

General references

Deuteronomy 5:18
Neither shall thou commit adultery.
Deuteronomy 6:25
And it shall be righteousness to us, if we observe to do all this commandment before LORD our God as he has commanded us.