Here are some Scriptures to consider:
Ephesians 6:11,12
Put on the full armor of God so that you can take your stand against the devil's schemes. For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.
Deuteronomy 18:9-14
When you enter the land the LORD your God is giving you, do not learn to imitate the detestable ways of the nations there. Let no one be found among you who sacrifices his son or daughter in the fire, who practices divination or sorcery, interprets omens, engages in witchcraft, or casts spells, or who is a medium or spiritualist or who consults the dead. Anyone who does these things is detestable to the LORD, and because of these detestable practices the LORD your God will drive out those nations before you. You must be blameless before the LORD your God. The nations you will dispossess listen to those who practice sorcery or divination. But as for you, the LORD your God has not permitted you to do so.
These are the strongest Scriptures on the matter, but by no means all of them. Hope this helps.