'Spirits' in the Bible

What I say is that the things offered by the Gentiles are offered to evil spirits and not to God; and it is not my desire for you to have any part with evil spirits.

It is not possible for you, at the same time, to take the cup of the Lord and the cup of evil spirits; you may not take part in the table of the Lord and the table of evil spirits.

And to another the power of working wonders; and to another the prophet's word; and to another the power of testing spirits; to another different sorts of tongues; and to another the power of making clear the sense of the tongues:

And the spirits of the prophets are controlled by the prophets;