Revelation 3:15

I know your works, that you are neither cold nor hot. I would that you were cold or hot.

Matthew 24:12

And because iniquity shall abound, the love of many will become cold.

Romans 12:11

As to diligence, not slothful, fervent in spirit, serving the Lord;

Revelation 3:1

And to the angel of the church in Sardis write: He who has the seven Spirits of God and the seven stars says these things. I know your works, that you have a name that you live, and are dead.

Deuteronomy 5:29

Oh that there were such a heart in them that they would fear Me and keep all My commandments always, so that it might be well with them and with their sons forever!

Joshua 24:15-24

And if it seems evil to you to serve Jehovah, choose this day whom you will serve, whether the gods which your fathers served Beyond the River, or the gods of the Amorites in whose land you live. But as for me and my house, we will serve Jehovah.

1 Kings 18:21

And Elijah came to all the people and said, How long are you limping over two opinions? If Jehovah is God, follow Him. But if Baal is God, then follow him. And the people did not answer him a word.

Psalm 81:11-13

But My people would not listen to My voice, and Israel would have none of Me.

Proverbs 23:26

My son, give Me your heart, and let your eyes watch My ways.

Hosea 7:8

Ephraim mixed himself among the peoples; Ephraim is a cake not turned.

Hosea 10:2

Their heart is divided; now they shall be guilty. He shall break down their altars, and He shall spoil their images.

Zephaniah 1:5-6

and those bowing to the host of heaven on the housetops, and those bowing, swearing to Jehovah, also swearing by Malcham;

Matthew 6:24

No one can serve two masters. For either he will hate the one and love the other, or else he will hold to the one and despise the other. You cannot serve God and mammon.

Matthew 10:37

He who loves father or mother more than Me is not worthy of Me. And he who loves son or daughter more than Me is not worthy of Me.

Luke 14:27-28

And whoever does not bear his cross and come after Me, he cannot be My disciple.

1 Corinthians 16:22

If anyone does not love the Lord Jesus Christ, let him be accursed. The Lord comes!

2 Corinthians 12:20

For I fear, lest somehow coming I might not find you as I wish, and that I shall be found by you such as you might not wish; lest somehow there be strifes, envyings, angers, contentions, backbitings, whisperings, proud thoughts, tumults;

Philippians 1:9

And this I pray, that your love may abound yet more and more in full knowledge and in all perception;

2 Thessalonians 1:3

We are bound to thank God always for you, my brothers, as it is right, because your faith grows exceedingly, and the love of each one of you abounds toward one another;

James 1:8

he is a double-minded man, not dependable in all his ways.

1 Peter 1:22

Purifying your souls in the obedience of the truth through the Spirit to unfeigned love of the brothers, love one another fervently out of a pure heart,

Revelation 2:2

I know your works and your labor and your patience, and how you cannot bear those who are evil. And you tried those pretending to be apostles, and are not, and have found them liars.

Revelation 2:4

But I have against you that you left your first love.

Treasury of Scripture Knowledge

Bible References

That

Revelation 2:4
But I have against you that you left your first love.
Matthew 24:12
And because iniquity shall abound, the love of many will become cold.
Philippians 1:9
And this I pray, that your love may abound yet more and more in full knowledge and in all perception;
2 Thessalonians 1:3
We are bound to thank God always for you, my brothers, as it is right, because your faith grows exceedingly, and the love of each one of you abounds toward one another;
1 Peter 1:22
Purifying your souls in the obedience of the truth through the Spirit to unfeigned love of the brothers, love one another fervently out of a pure heart,

I would

Deuteronomy 5:29
Oh that there were such a heart in them that they would fear Me and keep all My commandments always, so that it might be well with them and with their sons forever!
Psalm 81:11
But My people would not listen to My voice, and Israel would have none of Me.
2 Corinthians 12:20
For I fear, lest somehow coming I might not find you as I wish, and that I shall be found by you such as you might not wish; lest somehow there be strifes, envyings, angers, contentions, backbitings, whisperings, proud thoughts, tumults;

Thou

Joshua 24:15
And if it seems evil to you to serve Jehovah, choose this day whom you will serve, whether the gods which your fathers served Beyond the River, or the gods of the Amorites in whose land you live. But as for me and my house, we will serve Jehovah.
1 Kings 18:21
And Elijah came to all the people and said, How long are you limping over two opinions? If Jehovah is God, follow Him. But if Baal is God, then follow him. And the people did not answer him a word.
Proverbs 23:26
My son, give Me your heart, and let your eyes watch My ways.
Hosea 7:8
Ephraim mixed himself among the peoples; Ephraim is a cake not turned.
Hosea 10:2
Their heart is divided; now they shall be guilty. He shall break down their altars, and He shall spoil their images.
Zephaniah 1:5
and those bowing to the host of heaven on the housetops, and those bowing, swearing to Jehovah, also swearing by Malcham;
Matthew 6:24
No one can serve two masters. For either he will hate the one and love the other, or else he will hold to the one and despise the other. You cannot serve God and mammon.
Matthew 10:37
He who loves father or mother more than Me is not worthy of Me. And he who loves son or daughter more than Me is not worthy of Me.
Luke 14:27
And whoever does not bear his cross and come after Me, he cannot be My disciple.
1 Corinthians 16:22
If anyone does not love the Lord Jesus Christ, let him be accursed. The Lord comes!
James 1:8
he is a double-minded man, not dependable in all his ways.

General references

Luke 11:23
He who is not with Me is against Me, and he who does not gather with Me scatters.