James 2:10

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

Galatians 3:10

For as many as are of the works of the law are under a curse. For it is written, "Cursed is everyone who doesn't continue in all things that are written in the book of the law, to do them."

Deuteronomy 27:26

Cursed is he who doesn't confirm the words of this law to do them.' All the people shall say, 'Amen.'"

Matthew 5:18-19

For most certainly, I tell you, until heaven and earth pass away, not even one smallest letter or one tiny pen stroke shall in any way pass away from the law, until all things are accomplished.

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 doesn't confirm the words of this law to do them.' All the people shall say, 'Amen.'"
Matthew 5:18
For most certainly, I tell you, until heaven and earth pass away, not even one smallest letter or one tiny pen stroke shall in any way pass away from the law, until all things are accomplished.
Galatians 3:10
For as many as are of the works of the law are under a curse. For it is written, "Cursed is everyone who doesn't continue in all things that are written in the book of the law, to do them."

General references

Deuteronomy 5:18
"Neither shall you commit adultery.
Deuteronomy 6:25
It shall be righteousness to us, if we observe to do all this commandment before Yahweh our God, as he has commanded us."