Deuteronomy 8:17-18

You may say to yourself, “My power and the strength of my hands have produced this wealth for me.” But remember the LORD your God, for it is he who gives you the ability to produce wealth, and so confirms his covenant, which he swore to your forefathers, as it is today.

Isaiah 8:19

When men tell you to consult mediums and spiritists, who whisper and mutter, should not a people inquire of their God? Why consult the dead on behalf of the living?