1 Peter 1:22

Wherefore, having purified your souls by obeying the truth, through the Spirit, to unfeigned brotherly love, love one another, from a pure heart, fervently:

1 Peter 4:8

And above all things, have fervent love to one another; for love will cover a multitude of sins.

Revelation 2:4

Nevertheless, I have against you that you have lost your first love.

Revelation 3:15-16

I know your works, that you are neither cold nor hot: I wish you were either cold or hot.

Treasury of Scripture Knowledge

Summary

Not slothful in business; fervent in spirit; serving the Lord;

Bible References

Fervent

1 Peter 1:22
Wherefore, having purified your souls by obeying the truth, through the Spirit, to unfeigned brotherly love, love one another, from a pure heart, fervently:
1 Peter 4:8
And above all things, have fervent love to one another; for love will cover a multitude of sins.
Revelation 2:4
Nevertheless, I have against you that you have lost your first love.
Revelation 3:15
I know your works, that you are neither cold nor hot: I wish you were either cold or hot.