Matthew 24:12

And because wrongdoing will be increased, the love of most people will become cold.

James 4:1-4

What is the cause of wars and fighting among you? is it not in your desires which are at war in your bodies?

James 5:1-6

Come now, you men of wealth, give yourselves to weeping and crying because of the bitter troubles which are coming to you.

Revelation 2:4-5

But I have this against you, that you are turned away from your first love.

Revelation 2:10

Have no fear of the things which you will have to undergo: see, the Evil One will send some of you into prison, so that you may be put to the test; and you will have great trouble for ten days. Be true till death, and I will give you the crown of life.

Revelation 3:15

I have knowledge of your works, that you are not cold or warm: it would be better if you were cold or warm.

Treasury of Scripture Knowledge

Summary

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

Bible References

The love

Revelation 2:4
But I have this against you, that you are turned away from your first love.
Revelation 3:15
I have knowledge of your works, that you are not cold or warm: it would be better if you were cold or warm.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain