1 Corinthians 11:27

Hence anyone who eats the bread or drinks from the Lord's cup in a way that is unworthy of it will be guilty of profaning the body and the blood of the Lord.

1 Timothy 1:13

though I once used to abuse, persecute, and insult him. But he had mercy on me, because I had acted in ignorance and unbelief,

Hebrews 10:26-29

For if we choose to go on sinning after we have so fully learned the truth, there is no sacrifice left to be offered for our sins,

Treasury of Scripture Knowledge

Summary

And if the whole congregation of Israel sin through ignorance, and the thing be hid from the eyes of the assembly, and they have done somewhat against any of the commandments of the LORD concerning things which should not be done, and are guilty;

Through ignorance

Bible References

Through ignorance

1 Timothy 1:13
though I once used to abuse, persecute, and insult him. But he had mercy on me, because I had acted in ignorance and unbelief,
Hebrews 10:26
For if we choose to go on sinning after we have so fully learned the truth, there is no sacrifice left to be offered for our sins,