1 Corinthians 9:17

For, if I do this willingly, I have a reward; but, if unwillingly, I have been entrusted with a stewardship.

2 Corinthians 8:12

for, if the readiness is present, it is acceptable according to what one has, not according to what he has not.

2 Corinthians 9:7

Let each one do as he has purposed in his heart, not grudgingly or of necessity; for God loveth a cheerful giver.

Philippians 2:13

for it is God Who is working in you both to will and to work for His good pleasure.

Revelation 16:5-6

And I heard the angel of the waters, saying, "Righteous art Thou, Who art, and Who wast, the Holy One, because Thou didst thus judge;

Revelation 18:20

Rejoice over her, O Heaven, and ye saints, and ye apostles, and ye prophets; because God judged your judgment on her.'

Revelation 19:2

because true and righteous are His judgments; because He judged the great harlot; who, indeed, corrupted the earth with her fornication, and He avenged the blood of His servants at her hand."

Treasury of Scripture Knowledge

Summary

Praise ye the LORD for the avenging of Israel, when the people willingly offered themselves.

Bible References

For the avenging

Revelation 16:5
And I heard the angel of the waters, saying, "Righteous art Thou, Who art, and Who wast, the Holy One, because Thou didst thus judge;
Revelation 18:20
Rejoice over her, O Heaven, and ye saints, and ye apostles, and ye prophets; because God judged your judgment on her.'
Revelation 19:2
because true and righteous are His judgments; because He judged the great harlot; who, indeed, corrupted the earth with her fornication, and He avenged the blood of His servants at her hand."

When

1 Corinthians 9:17
For, if I do this willingly, I have a reward; but, if unwillingly, I have been entrusted with a stewardship.
2 Corinthians 8:12
for, if the readiness is present, it is acceptable according to what one has, not according to what he has not.
2 Corinthians 9:7
Let each one do as he has purposed in his heart, not grudgingly or of necessity; for God loveth a cheerful giver.
Philippians 2:13
for it is God Who is working in you both to will and to work for His good pleasure.
Philemon 1:14
but, without your consent, I was willing to do nothing; that your beneficence might not be by necessity, but by choice.