1 Corinthians 11:27

Whoever, therefore, in an unworthy manner, eats the bread or drinks from the cup of the Lord sins against the body and blood of the Lord.

1 Timothy 1:13

though I was previously a blasphemer and a persecutor and had been insolent in outrage. Yet mercy was shown me, because I had acted ignorantly, not having as yet believed;

Hebrews 10:26-29

For if we wilfully persist in sin after having received the full knowledge of the truth, there no longer remains in reserve any other sacrifice for 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 was previously a blasphemer and a persecutor and had been insolent in outrage. Yet mercy was shown me, because I had acted ignorantly, not having as yet believed;
Hebrews 10:26
For if we wilfully persist in sin after having received the full knowledge of the truth, there no longer remains in reserve any other sacrifice for sins.