I found 73 references to demons in scripture.
I’ll be studying each reference in context, in order to learn whatever it is we should know about this topic.

REFERENCE #1
Leviticus 17:7
They are no longer to offer their sacrifices to the goat–demons after which they play the prostitute. This will be a statute forever to them throughout their generations.

Leviticus 17 tells us there was an issue, all the way back then, that people were making animal sacrifices to other gods, even in the camps of the Exodus (believe it or not). These people literally saw the miracles of being delivered from Egypt, and yet they were seeking after other gods, making sacrifices to “goat-demons.” [Tree of Life version].

KJV uses the word “devils” instead of goat-demons.
The Hebrew word used is saiyr H8163
Definition:  satyr, may refer to a demon possessed goat like the swine of Gadara

Yahuah commands Israel in Leviticus 17 to no longer do this, offering sacrifices to any other god.
They are allowed to make animal sacrifices for fellowship to Yahuah. They must bring the sacrifice to the entrance to the Tabernacle, and the Kohen must sprinkle the blood on the alter.
Anyone who violates this will be cut off from their people.
To be cut off is the Hebrew word karath (H3772).
It means to be cut off, destroyed, beheaded.
The consequences for this violation are serious.

REFERENCE #2
Deuteronomy 32:17
They sacrificed to demons, a non-god, gods they had not known— to new ones who came in lately, ones your fathers had not dreaded.

Deuteronomy 32:17 mentions (in the song of Moses) that the people sacrificed (or will, if prophecy) to demons, to non-gods.
Subsequent verses speak of Yahuah’s jealousy and anger, and all the horrific consequences for being spiritually unfaithful to Him.

What do we learn from Levitcus and Deuteronomy?
We learn that demons exist and they are associated with other gods.
We learn that people turned away from their Creator and sought after other gods, demons in the sight of Yahuah, and He was not pleased.
Making this choice will cost you everything.
It is unwise beyond imagination to honor demons and false gods.

Bottom line:
Demons exist.
Do not seek after them.
Do not try to honor or worship them, do not make sacrifices to them.