Tractate Sanhedrin: Those Punishable By Decapitation (continued): (5) He who prophesies in the Name of a False God
Tractate Sanhedrin, Herbert Danby tr. [1919]
M.XI. 6a. He who prophesies in the name of a false god, 1 is he who says: "Thus saith the god." Such a one is guilty even though his message confirm the halaka concerning unclean and clean things.
141:1 Deut. 18. 20.