Leviticus 15:4

Every bed on which he has been resting will be unclean, and everything on which he has been seated will be unclean.

1 Corinthians 15:33

Do not be tricked by false words: evil company does damage to good behaviour.

Ephesians 5:11

And have no company with the works of the dark, which give no fruit, but make their true quality clear;

Titus 1:15

To the clean in heart all things are clean: but to those who are unclean and without faith nothing is clean; they become unclean in mind and in thought.

Treasury of Scripture Knowledge

Summary

Every bed, whereon he lieth that hath the issue, is unclean: and every thing, whereon he sitteth, shall be unclean.

General references

Bible References

Be unclean

1 Corinthians 15:33
Do not be tricked by false words: evil company does damage to good behaviour.
Ephesians 5:11
And have no company with the works of the dark, which give no fruit, but make their true quality clear;
Titus 1:15
To the clean in heart all things are clean: but to those who are unclean and without faith nothing is clean; they become unclean in mind and in thought.

General references

Leviticus 15:20
And everything on which she has been resting, while she is kept separate, will be unclean, and everything on which she has been seated will be unclean.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain