James 2:10

For whoever obeys the whole of the Law and only makes a single slip, is guilty of everything.

Galatians 3:10

Whereas a curse rests on all who rely upon obedience to the Law; for it is written, Cursed is everyone who does not hold by all that is written in the book of the law, to perform it.

Matthew 5:18-19

(I tell you truly, till heaven and earth pass away not an iota, not a comma, will pass from the Law until it is all in force.

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
(I tell you truly, till heaven and earth pass away not an iota, not a comma, will pass from the Law until it is all in force.
Galatians 3:10
Whereas a curse rests on all who rely upon obedience to the Law; for it is written, Cursed is everyone who does not hold by all that is written in the book of the law, to perform it.