7 Bible Verses about Penalties For Serving Other Gods

and the reviling, if ye do not hearken unto the commands of Jehovah your God, and have turned aside out of the way which I am commanding you to-day, to go after other gods which ye have not known.

'When there is found in thy midst, in one of thy cities which Jehovah thy God is giving to thee, a man or a woman who doth the evil thing in the eyes of Jehovah thy God by transgressing His covenant, and he doth go and serve other gods, and doth bow himself to them, and to the sun, or to the moon, or to any of the host of the heavens, which I have not commanded -- and it hath been declared to thee, and thou hast heard, and hast searched diligently, and lo, truth; the thing is established; this abomination hath been done in Israel -- read more.
Then thou hast brought out that man, or that woman, who hath done this evil thing, unto thy gates -- the man or the woman -- and thou hast stoned them with stones, and they have died. By the mouth of two witnesses or of three witnesses is he who is dead put to death; he is not put to death by the mouth of one witness; the hand of the witnesses is on him, in the first place, to put him to death, and the hand of all the people last; and thou hast put away the evil thing out of thy midst.

'He who is sacrificing to a god, save to Jehovah alone, is devoted.

'And if thy heart doth turn, and thou dost not hearken, and hast been driven away, and hast bowed thyself to other gods, and served them,

Sojourner, fatherless, and widow, ye oppress not, And innocent blood do not shed in this place, And after other gods do not walk, for evil to yourselves,

they do not dwell in thy land, lest they cause thee to sin against Me when thou servest their gods, when it becometh a snare to thee.'

Only, the prophet who presumeth to speak a word in My name -- that which I have not commanded him to speak -- and who speaketh in the name of other gods -- even that prophet hath died.