10 Let there not be seen among you anyone who makes his son or his daughter go through the fire, or anyone using secret arts, or a maker of strange sounds, or a reader of signs, or any wonder-worker, 11 Or anyone using secret force on people, or putting questions to a spirit, or having secret knowledge, or going to the dead for directions. 12 For all who do such things are disgusting to the Lord; and because of these disgusting things the Lord your God is driving them out before you.
Matthew Henry's Commentary on Deuteronomy 18:10-12
Commentary on Deuteronomy 18:9-14
(Read Deuteronomy 18:9-14)
Was it possible that a people so blessed with Divine institutions, should ever be in any danger of making those their teachers whom God had made their captives? They were in danger; therefore, after many like cautions, they are charged not to do after the abominations of the nations of Canaan. All reckoning of lucky or unlucky days, all charms for diseases, all amulets or spells to prevent evil, fortune-telling, &c. are here forbidden. These are so wicked as to be a chief cause of the rooting out of the Canaanites. It is amazing to think that there should be any pretenders of this kind in such a land, and day of light, as we live in. They are mere impostors who blind and cheat their followers.