11 Bible Verses about Forbidden Alliances

"You must make no covenant with them or with their gods. They must not live in your land, lest they make you sin against me, for if you serve their gods, it will surely be a snare to you."

Be careful not to make a covenant with the inhabitants of the land where you are going, lest it become a snare among you. Rather you must destroy their altars, smash their images, and cut down their Asherah poles. For you must not worship any other god, for the Lord, whose name is Jealous, is a jealous God.read more.
Be careful not to make a covenant with the inhabitants of the land, for when they prostitute themselves to their gods and sacrifice to their gods, and someone invites you, you will eat from his sacrifice;

and he delivers them over to you and you attack them, you must utterly annihilate them. Make no treaty with them and show them no mercy!

but you must not make an agreement with the people who live in this land. You should tear down the altars where they worship.' But you have disobeyed me. Why would you do such a thing?

the prophet Jehu son of Hanani confronted him; he said to King Jehoshaphat, "Is it right to help the wicked and be an ally of those who oppose the Lord? Because you have done this the Lord is angry with you!

Eliezer son of Dodavahu from Mareshah prophesied against Jehoshaphat, "Because you made an alliance with Ahaziah, the Lord will shatter what you have made." The ships were wrecked and unable to go to sea.

Indeed this is what the Lord told me. He took hold of me firmly and warned me not to act like these people: "Do not say, 'Conspiracy,' every time these people say the word. Don't be afraid of what scares them; don't be terrified.

They travel down to Egypt without seeking my will, seeking Pharaoh's protection, and looking for safety in Egypt's protective shade.

Those who go down to Egypt for help are as good as dead, those who rely on war horses, and trust in Egypt's many chariots and in their many, many horsemen. But they do not rely on the Holy One of Israel and do not seek help from the Lord.

Ephraim has attached himself to idols; Do not go near him!

Ephraim continually feeds on the wind; he chases the east wind all day; he multiplies lies and violence. They make treaties with Assyria, and send olive oil as tribute to Egypt.