Romans 16:18-19

for such as these serve not our Lord Jesus Christ, but their own selfishness; and by flourish and flattery, deceive the open-hearted simple.

Hebrews 5:2

he might have the greater compassion for those who sin through ignorance or mistake. and for the same reason

Treasury of Scripture Knowledge

Summary

And so thou shalt do the seventh day of the month for every one that erreth, and for him that is simple: so shall ye reconcile the house.

Bible References

Every one

Romans 16:18
for such as these serve not our Lord Jesus Christ, but their own selfishness; and by flourish and flattery, deceive the open-hearted simple.
Hebrews 5:2
he might have the greater compassion for those who sin through ignorance or mistake. and for the same reason