2 Corinthians 6:15

What agreement has Christ with Belial? Or what portion has a believer with an unbeliever?

1 Samuel 5:2-4

The Philistines took the ark of God, and brought it into the house of Dagon, and set it by Dagon.

1 Kings 18:21

Elijah came near to all the people, and said, "How long will you waver between the two sides? If Yahweh is God, follow him; but if Baal, then follow him." The people answered him not a word.

Ezra 4:3

But Zerubbabel, and Jeshua, and the rest of the heads of fathers' [houses] of Israel, said to them, "You have nothing to do with us in building a house to our God; but we ourselves together will build to Yahweh, the God of Israel, as king Cyrus the king of Persia has commanded us."

Mark 16:16

He who believes and is baptized will be saved; but he who disbelieves will be condemned.

Acts 5:14

More believers were added to the Lord, multitudes of both men and women.

Acts 8:20

But Peter said to him, "May your silver perish with you, because you thought you could obtain the gift of God with money!

1 Corinthians 10:20-21

But I say that the things which the Gentiles sacrifice, they sacrifice to demons, and not to God, and I don't desire that you would have fellowship with demons.

1 Timothy 5:8

But if anyone doesn't provide for his own, and especially his own household, he has denied the faith, and is worse than an unbeliever.

1 John 5:11-13

The testimony is this, that God gave to us eternal life, and this life is in his Son.

Treasury of Scripture Knowledge

Summary

And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?

Bible References

What concord

1 Samuel 5:2
The Philistines took the ark of God, and brought it into the house of Dagon, and set it by Dagon.
1 Kings 18:21
Elijah came near to all the people, and said, "How long will you waver between the two sides? If Yahweh is God, follow him; but if Baal, then follow him." The people answered him not a word.
1 Corinthians 10:20
But I say that the things which the Gentiles sacrifice, they sacrifice to demons, and not to God, and I don't desire that you would have fellowship with demons.

Or

Ezra 4:3
But Zerubbabel, and Jeshua, and the rest of the heads of fathers' [houses] of Israel, said to them, "You have nothing to do with us in building a house to our God; but we ourselves together will build to Yahweh, the God of Israel, as king Cyrus the king of Persia has commanded us."
Mark 16:16
He who believes and is baptized will be saved; but he who disbelieves will be condemned.
Acts 8:20
But Peter said to him, "May your silver perish with you, because you thought you could obtain the gift of God with money!
1 John 5:11
The testimony is this, that God gave to us eternal life, and this life is in his Son.

An

1 Timothy 5:8
But if anyone doesn't provide for his own, and especially his own household, he has denied the faith, and is worse than an unbeliever.

General references

Exodus 20:23
You shall most certainly not make alongside of me gods of silver, or gods of gold for yourselves.
Exodus 34:16
and you take of their daughters to your sons, and their daughters play the prostitute after their gods, and make your sons play the prostitute after their gods.
Deuteronomy 7:3
neither shall you make marriages with them; your daughter you shall not give to his son, nor shall you take his daughter for your son.
Proverbs 22:24
Don't befriend a hot-tempered man, and don't associate with one who harbors anger:
Amos 3:3
Do two walk together, unless they have agreed?