1 Corinthians 10:20

On the contrary, the things which the Gentiles (pagans) sacrifice, they sacrifice to demons [in effect], and not to God; and I do not want you to become partners with demons [by eating at feasts in pagan temples].

Revelation 9:20

The rest of mankind, who were not killed by these plagues, did not repent even then of the works of their hands, so as to cease worshiping and paying homage to the demons and the idols of gold and of silver and of bronze and of stone and of wood, which can neither see nor hear nor walk;

Leviticus 17:7

So they shall no longer offer their sacrifices to goat-idols or demons or field spirits with which they have played the prostitute. This shall be a permanent statute for them throughout their generations.”’

Deuteronomy 32:16-17


“They provoked Him to jealousy with strange gods [by denying Him the honor and loyalty that is rightfully and uniquely His];
And with repulsive acts they provoked Him to anger.

2 Chronicles 11:15

Jeroboam appointed his own priests for the high places, for the satyrs (goat demons) and calves (idols) which he had made.

Psalm 106:37-39


They even sacrificed their sons and their daughters to demons

2 Corinthians 4:4

among them the god of this world [Satan] has blinded the minds of the unbelieving to prevent them from seeing the illuminating light of the gospel of the glory of Christ, who is the image of God.

Treasury of Scripture Knowledge

Summary

But I say, that the things which the Gentiles sacrifice, they sacrifice to devils, and not to God: and I would not that ye should have fellowship with devils.

Bible References

Sacrifice

Leviticus 17:7
So they shall no longer offer their sacrifices to goat-idols or demons or field spirits with which they have played the prostitute. This shall be a permanent statute for them throughout their generations.”’
Deuteronomy 32:16

“They provoked Him to jealousy with strange gods [by denying Him the honor and loyalty that is rightfully and uniquely His];
And with repulsive acts they provoked Him to anger.
2 Chronicles 11:15
Jeroboam appointed his own priests for the high places, for the satyrs (goat demons) and calves (idols) which he had made.
Psalm 106:37

They even sacrificed their sons and their daughters to demons
2 Corinthians 4:4
among them the god of this world [Satan] has blinded the minds of the unbelieving to prevent them from seeing the illuminating light of the gospel of the glory of Christ, who is the image of God.
Revelation 9:20
The rest of mankind, who were not killed by these plagues, did not repent even then of the works of their hands, so as to cease worshiping and paying homage to the demons and the idols of gold and of silver and of bronze and of stone and of wood, which can neither see nor hear nor walk;