20 He that sacrifices to any gods but to the Lord alone, shall be destroyed by death.
Exodus 22:20 Cross References - LXX2012
Numbers 21:3
3 And the Lord listened to the voice of Israel, and delivered the Chananite into his power; and [Israel] devoted him and his cities, and they called the name of that place Anathema.
Numbers 25:2-4
2 And they called them to the sacrifices of their idols; and the people ate of their sacrifices, and worshipped their idols.
3 And Israel consecrated themselves to Beel-phegor; and the Lord was very angry with Israel.
4 And the Lord said to Moses, Take all the princes of the people, and make them examples [of judgment] for the Lord in the face of the sun, and the anger of the Lord shall be turned away from Israel.
Numbers 25:7-8
7 And Phinees the son of Eleazar, the son of Aaron the priest, saw it, and rose out of the midst of the congregation, and took a javelin in his hand,
8 and went in after the Israelitish man into the chamber, and pierced them both through, both the Israelitish man, and the woman through her womb; and the plague was stayed from the children of Israel.
Deuteronomy 13:1-15
1 And if there arise within you a prophet, or one who dreams a dream, and he gives you a sign or a wonder,
2 and the sign or the wonder come to pass which he spoke to you, saying, Let us go and serve other gods, which you⌃ know not;
3 you⌃ shall not listen to the words of that prophet, or the dreamer of that dream, because the Lord your God tries you, to know whether you⌃ love your God with all your heart and with all your soul.
4 You⌃ shall follow the Lord your God, and fear him, and you⌃ shall hear his voice, and attach yourselves to him.
5 And that prophet or that dreamer of a dream, shall die; for he has spoken to make you err from the Lord your God who brought you out of the land of Egypt, who redeemed you from bondage, to thrust you out of the way which the Lord your God commanded you to walk in: so shall you abolish the evil from among you.
6 And if your brother by your father or mother, or your son, or daughter, or your wife in your bosom, or friend who is equal to your own soul, entreat you secretly, saying, Let us go and serve other gods, which neither you nor your fathers have known,
7 of the gods of the nations that are round about you, who are near you or at a distance from you, from one end of the earth to the other;
8 you shall not consent to him, neither shall you listen to him; and your eye shall not spare him, you shall feel no regret for him, neither shall you at all protect him:
9 you shall surely report concerning him, and your hands shall be upon him among the first to kill him, and the hands of all the people at the last.
10 And they shall stone him with stones, and he shall die, because he sought to draw you away from the Lord your God who brought you out of the land of Egypt, out of the house of bondage.
11 And all Israel shall hear, and fear, and shall not again do according to this evil thing among you.
12 And if in one of your cities which the Lord God gives you to dwell therein, you shall hear men saying,
13 Evil men have gone out from you, and have caused all the inhabitants of their land to fall away, saying, Let us go and worship other gods, whom you⌃ knew not,
14 then you shall enquire and ask, and search diligently, and behold, [if] the thing is clearly true, and this abomination has taken place among you,
15 you shall utterly destroy all the dwellers in that land with the edge of the sword; you⌃ shall solemnly curse it, and all things in it.
Deuteronomy 17:2-5
2 And if there should be found in any one of your cities, which the Lord your God gives you, a man or a woman who shall do that which is evil before the Lord your God, so as to transgress his covenant,
3 and they should go and serve other gods, and worship them, the sun, or the moon, or any of the host of heaven, which he commanded you not to do,
4 and it be told you, and you shall have enquired diligently, and, behold, the thing really took place, this abomination has been done in Israel;
5 then shall you bring out that man, or that woman, and you⌃ shall stone them with stones, and they shall die.
Deuteronomy 18:20
20 But the prophet whoever shall impiously speak in my name a word which I have not commanded him to speak, and whoever shall speak in the name of other gods, that prophet shall die.
Joshua 23:15-16
15 And it shall come to pass, that as all the good things are come upon us which the Lord God will bring upon you all the evil things, until he shall have destroyed you from off this good land, which the Lord has given you,
16 when you⌃ transgress the covenant of the Lord our God, which he has charged us, and go and serve other gods, and bow down to them.