Leviticus 20:25:26 

You shall therefore distinguish between clean animals and unclean animals, between unclean birds and clean,

and you shall not make yourselves abominable by beast or by bird,

or by any kind of living thing that creeps on the ground, which I have separated from you as unclean.

Matthew 10:1:

[ The Twelve Apostles ] And when He had called His twelve disciples to Him,

He gave them power over unclean spirits, to cast them out, and to heal all kinds of sickness and all kinds of disease.

Ezekiel 44:23:

“And they shall teach My people the difference between the holy and the unholy,

and cause them to discern between the unclean and the clean.

Mark 9:25:

When Yeshua saw that the people came running together,

He rebuked the unclean spirit, saying to it, “Deaf and dumb spirit, I command you, come out of him and enter him no more!”

Acts 5:16:

Also a multitude gathered from the surrounding cities to Jerusalem,

bringing sick people and those who were tormented by unclean spirits, and they were all healed.

Luke 4:36:

Then they were all amazed and spoke among themselves, saying,

“What a word this is! For with authority and power He commands the unclean spirits, and they come out.”

Acts 5:16:

Also a multitude gathered from the surrounding cities to Jerusalem,

bringing sick people and those who were tormented by unclean spirits, and they were all healed.

Revelation 16:13:
And I saw three unclean spirits like frogs coming out of the mouth of the dragon,

out of the mouth of the beast, and out of the mouth of the false prophet.

Luke 4:31-32New King James Version (NKJV)

³¹ Then He went down to Capernaum, a city of Galilee, and was teaching them on the Sabbaths. 

³² And they were astonished at His teaching, for His word was with authority.

Revelation 16:13:

And I saw three unclean spirits like frogs coming out of the mouth of the dragon, out of the mouth of the beast, and out of the mouth of the false prophet.

14 For they are spirits of demons, performing signs, which go out to the kings of the earth and of the whole world,

to gather them to the battle of that great day of God Almighty.

The unclean behaviors of wickedness reaching the fulness where they give political power to evil kings:

Daniel 8:23:

“And in the latter time of their kingdom, When the transgressors have reached their fullness,

A king shall arise, Having fierce features, Who understands sinister schemes.