Matthew 6:23

but if thine eye be bad, thy whole body will be dark. If therefore the light that is in thee be darkness, how great is that darkness!

2 Peter 2:1-2

But there were indeed false prophets among the people of old, as there will be also among you false teachers, who will privately introduce pernicious heresies, denying even the Lord that bought them, and bringing upon themselves swift destruction,

2 John 1:8-10

Look to yourselves, that ye lose not the things which ye have wrought, but that ye may receive a full reward.

Treasury of Scripture Knowledge

Summary

He is a leprous man, he is unclean: the priest shall pronounce him utterly unclean; his plague is in his head.

Bible References

Utterly unclean

Matthew 6:23
but if thine eye be bad, thy whole body will be dark. If therefore the light that is in thee be darkness, how great is that darkness!
2 Peter 2:1
But there were indeed false prophets among the people of old, as there will be also among you false teachers, who will privately introduce pernicious heresies, denying even the Lord that bought them, and bringing upon themselves swift destruction,
2 John 1:8
Look to yourselves, that ye lose not the things which ye have wrought, but that ye may receive a full reward.