Exodus 22:20
One sacrificing to a god, except it is to Jehovah only, he shall be utterly destroyed.
Deuteronomy 17:2-5
If there is found among you, inside any of your gates which Jehovah your God gives you, a man or woman who does what is evil in the sight of Jehovah your God, in breaking His covenant,
Numbers 25:7-8
And when Phinehas, the son of Eleazar, the son of Aaron the priest, saw it, he rose up from among the congregation and took a spear in his hand.
Deuteronomy 13:1-15
If a prophet rises among you, or a dreamer of dreams, and gives you a sign or a wonder,
Deuteronomy 18:20
But the prophet who shall presume to speak a word in My name which I have not commanded him to speak or who shall speak in the name of other gods, even that prophet shall die.
Numbers 21:3
And Jehovah listened to the voice of Israel and delivered up the Canaanites. And they completely destroyed them and their cities. And he called the name of the place Hormah.
Numbers 25:2-4
And they called the people to the sacrifices of their gods. And the people ate and bowed down to their gods.
Joshua 23:15-16
And it shall be, as comes to you every good thing which Jehovah your God has spoken to you has come to you, so shall Jehovah bring on you every evil thing until He has destroyed you from off this good land which Jehovah your God has given you,