7 Bible Verses about Penalties For Serving Other Gods

and the curse, if you do not obey the commandments of the LORD your God, but turn aside from the way that I am commanding you today, to go after other gods that you have not known.

"If there is found among you, within any of your towns that the LORD your God is giving you, a man or woman who does what is evil in the sight of the LORD your God, in transgressing his covenant, and has gone and served other gods and worshiped them, or the sun or the moon or any of the host of heaven, which I have forbidden, and it is told you and you hear of it, then you shall inquire diligently, and if it is true and certain that such an abomination has been done in Israel,read more.
then you shall bring out to your gates that man or woman who has done this evil thing, and you shall stone that man or woman to death with stones. On the evidence of two witnesses or of three witnesses the one who is to die shall be put to death; a person shall not be put to death on the evidence of one witness. The hand of the witnesses shall be first against him to put him to death, and afterward the hand of all the people. So you shall purge the evil from your midst.

"Whoever sacrifices to any god, other than the LORD alone, shall be devoted to destruction.

But if your heart turns away, and you will not hear, but are drawn away to worship other gods and serve them,

if you do not oppress the sojourner, the fatherless, or the widow, or shed innocent blood in this place, and if you do not go after other gods to your own harm,

They shall not dwell in your land, lest they make you sin against me; for if you serve their gods, it will surely be a snare to you."

But the prophet who presumes to speak a word in my name that I have not commanded him to speak, or who speaks in the name of other gods, that same prophet shall die.'