James 2:10

For whoever keeps the whole law but stumbles in one [point only] has become guilty of all [of it].

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 does not abide by all [the things] that are written in the book of the law to do them."

Deuteronomy 27:26

'Cursed be [the one] {who does not keep} the words of this law, to observe them.' And all the people shall say, 'Amen.'"

Matthew 5:18-19

For truly I say to you, until heaven and earth pass away, not one tiny letter or one stroke of a letter will pass away from the law until all takes place.

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 be [the one] {who does not keep} the words of this law, to observe them.' And all the people shall say, 'Amen.'"
Matthew 5:18
For truly I say to you, until heaven and earth pass away, not one tiny letter or one stroke of a letter will pass away from the law until all takes place.
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 does not abide by all [the things] that are written in the book of the law to do them."

General references

Deuteronomy 5:18
'And you shall not commit adultery.
Deuteronomy 6:25
And it shall be righteousness for us if we diligently observe [and] do all [of] this commandment {before} Yahweh our God, as he has commanded us.'