(Devarim 13:6) "And that prophet": and not one who is under compulsion.

"or that dreamer": and not one who is under some misapprehension.

"he is to be put to death, for he has spoken perversely of the L-rd your G-d": Now does this not follow a fortiori, viz.: If one falsifies his neighbor's words, he is (in certain instances) to be put to death, then if (as a false prophet) he falsifies the words of the L-rd, how much more so!

"who took you out of the land of Egypt": Even if your only indebtedness to Him were His taking you out of the land of Egypt, would that not be sufficient!

"and who redeemed you from the house of bondage": Even if your only indebtedness to Him were His taking you out of the house of bondage, would that not be sufficient!

"to turn you astray from the way": It is written here "turning astray," and, elsewhere (Ibid. 11) (in respect to one who incites to idol worship), "turning astray." Just as there the punishment is stoning, so, here. R. Shimon says: This one's death is only by strangulation.

("who turned you astray) from the way": even part of the way.

"which the L-rd your G-d commanded you": This refers to (being turned astray from) a negative commandment.

"on which to go": This refers to (being turned astray from) a positive commandment.

"and you shall remove the evil from your midst": Remove the doers of evil from Israel.