Matthew 6:24

No man can serve two masters: for he will either hate the one, and love the other; or he will adhere to the one, and disregard the other. Ye cannot serve God and mammon.

1 Corinthians 10:21-22

Ye cannot drink the cup of the Lord and the cup of daemons: ye cannot be partakers of the table of the Lord, and the table of daemons.

Matthew 22:12

and he saith to him, Friend, how came thou in here, not having the garment provided for the marriage feast? And he was speechless.

Matthew 22:34

But the Pharisees hearing that he had stopped the Sadducees' mouths, they assembled together:

Matthew 22:36

Master, which is the great commandment in the law?

Luke 6:13

And when it was day, he called his disciples to him; and elected from them twelve, whom he named Apostles:

Romans 3:19

Now we know that whatsoever things the law saith, it speaks to those who are under the law: that every mouth might be sealed up, and all the world become criminal before God.

Romans 6:16-22

Do ye not know, that to whomsoever ye present yourselves servants to obey, ye are his servants to whom ye obey; if of sin unto death, or of obedience, unto righteousness?

2 Corinthians 6:14-16

Be not unequally yoked with infidels; for what participation hath righteousness with unrighteousness? and what fellowship [is there] between light and darkness?

Revelation 3:15-16

I know thy works, that thou art neither cold nor hot:

Treasury of Scripture Knowledge

Summary

And Elijah came unto all the people, and said, How long halt ye between two opinions? if the LORD be God, follow him: but if Baal, then follow him. And the people answered him not a word.

General references

Bible References

Answered

Matthew 22:12
and he saith to him, Friend, how came thou in here, not having the garment provided for the marriage feast? And he was speechless.
Romans 3:19
Now we know that whatsoever things the law saith, it speaks to those who are under the law: that every mouth might be sealed up, and all the world become criminal before God.
Romans 6:21
What fruit therefore had ye then in those things at which ye are now confounded? for the end of those things is death.

General references

James 1:8
A double-minded man is unsteady in all his ways.