2 Corinthians 6:15

And what agreement [does] Christ [have] with Beliar? Or what share [does] a believer [have] with an unbeliever?

1 Samuel 5:2-4

Then [the] Philistines took the ark of God and brought it to the temple of Dagon and placed it beside Dagon.

1 Kings 18:21

Elijah approached to all the people and said, "How long [will] you [go] limping over two opinions? If Yahweh [is] God, go after him; but if Baal, go after him." But the people did not answer him a word.

Ezra 4:3

But Zerubbabel, Jeshua, and the rest of the heads of the {families} of Israel said to them, "[It is] not for you but for us to build a house for our God. For we ourselves alone will build [it] for Yahweh the God of Israel, just as Cyrus the king of Persia has commanded us."

Mark 16:16

The one who believes and is baptized will be saved, but the one who refuses to believe will be condemned.

Acts 5:14

And even more believers in the Lord were being added, large numbers of both men and women,

Acts 8:20

But Peter said to him, "May your silver {be destroyed along with you}, because you thought {you could acquire} the gift of God by means of money!

1 Corinthians 10:20-21

[No], but that [the things] which they sacrifice, they sacrifice to demons and not to God, and I do not want you to become sharers with demons.

1 Timothy 5:8

But if someone does not provide for his own [relatives], and especially the members of his household, he has denied the faith and is worse than an unbeliever.

1 John 5:11-13

And this is the testimony: that God has given 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
Then [the] Philistines took the ark of God and brought it to the temple of Dagon and placed it beside Dagon.
1 Kings 18:21
Elijah approached to all the people and said, "How long [will] you [go] limping over two opinions? If Yahweh [is] God, go after him; but if Baal, go after him." But the people did not answer him a word.
1 Corinthians 10:20
[No], but that [the things] which they sacrifice, they sacrifice to demons and not to God, and I do not want you to become sharers with demons.

Or

Ezra 4:3
But Zerubbabel, Jeshua, and the rest of the heads of the {families} of Israel said to them, "[It is] not for you but for us to build a house for our God. For we ourselves alone will build [it] for Yahweh the God of Israel, just as Cyrus the king of Persia has commanded us."
Mark 16:16
The one who believes and is baptized will be saved, but the one who refuses to believe will be condemned.
Acts 8:20
But Peter said to him, "May your silver {be destroyed along with you}, because you thought {you could acquire} the gift of God by means of money!
1 John 5:11
And this is the testimony: that God has given us eternal life, and this life is in his Son.

An

1 Timothy 5:8
But if someone does not provide for his own [relatives], and especially the members of his household, he has denied the faith and is worse than an unbeliever.

General references

Exodus 20:23
You will not make alongside me gods of silver, and gods of gold you will not make for yourselves.
Exodus 34:16
and you take from their daughters for your sons, and their daughters prostitute [themselves] after their gods, and they cause your sons to prostitute [themselves] after their gods.
Deuteronomy 7:3
And you shall not intermarry with them; you shall not give your daughter to their son; and you shall not take his daughter for your son.
Proverbs 22:24
Do not befriend an owner of {anger}, and with a man of wrath you shall not associate;
Amos 3:3
Do two walk together unless they have met?