7 Bible Verses about Penalties For Serving Other Gods

and a curse, if ye will not obey the commandments of Jehovah your God, but turn aside out of the way which I command you this day, to go after other gods which ye have not known.

If there be found in thy midst in any of thy gates which Jehovah thy God giveth thee, man or woman, that doeth what is evil in the sight of Jehovah thy God, in transgressing his covenant, and goeth and serveth other gods, and boweth down to them, either to the sun or to the moon, or to the whole host of heaven, which I have not commanded; and it be told thee, and thou hearest of it; then thou shalt make thorough inquiry, and if it be truth and the thing be certain, that this abomination hath been wrought in Israel,read more.
thou shalt bring forth that man or that woman, who committed that wicked thing, unto thy gates, the man or the woman, and shalt stone them with stones, that they die. At the mouth of two witnesses, or three witnesses, shall he that is to die be put to death: he shall not be put to death at the mouth of one witness. The hands of the witnesses shall be first upon him to put him to death, and afterwards the hands of all the people; and thou shalt put evil away from thy midst.

He that sacrificeth to any god, save to Jehovah only, shall be devoted to destruction.

But if thy heart turn away, so that thou wilt not hear, but shalt be drawn away, and thou shalt bow down to other gods and serve them;

if ye oppress not the stranger, the fatherless, and the widow, and shed no innocent blood in this place, neither walk after other gods to your hurt;

They shall not dwell in thy land, lest they make thee sin against me; for if thou serve their gods, it is sure to be a snare unto thee.

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