James 2:10

For whosoever keeps the whole law, but stumbles in one point, has become guilty of all.

Galatians 3:10

For as many as are of works of law are under a curse; for it has been written, "Cursed is every one who continues not in all the things written in the book of the law, to do them."

Matthew 5:18-19

For verily I say to you, till the heaven and the earth pass away, one jot or one tittle shall in no wise pass away from the law, till all things be accomplished.

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
For verily I say to you, till the heaven and the earth pass away, one jot or one tittle shall in no wise pass away from the law, till all things be accomplished.
Galatians 3:10
For as many as are of works of law are under a curse; for it has been written, "Cursed is every one who continues not in all the things written in the book of the law, to do them."