James 2:10

for whoever the whole law shall keep, and shall stumble in one point, he hath become guilty of all;

Galatians 3:10

for as many as are of works of law are under a curse, for it hath been written, 'Cursed is every one who is not remaining in all things that have been written in the Book of the Law -- to do them,'

Deuteronomy 27:26

Cursed is he who doth not establish the words of this law, to do them, -- and all the people have said, Amen.

Matthew 5:18-19

for, verily I say to you, till that the heaven and the earth may pass away, one iota or one tittle may not pass away from the law, till that all may 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 he who doth not establish the words of this law, to do them, -- and all the people have said, Amen.
Matthew 5:18
for, verily I say to you, till that the heaven and the earth may pass away, one iota or one tittle may not pass away from the law, till that all may come to pass.
Galatians 3:10
for as many as are of works of law are under a curse, for it hath been written, 'Cursed is every one who is not remaining in all things that have been written in the Book of the Law -- to do them,'

General references

Deuteronomy 5:18
'Thou dost not commit adultery.
Deuteronomy 6:25
and righteousness it is for us, when we observe to do all this command before Jehovah our God, as He hath commanded us.