1 Corinthians 9:17

For if I do this voluntarily, I have a reward; but if it is not of my will, I have a stewardship entrusted to me.

2 Corinthians 8:12

For if the readiness is there, it is acceptable according to what a man has, not according to what he does not have.

2 Corinthians 9:7

Each one must give just as he has purposed in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.

Philippians 2:13

for it is God who is at work in you, both to will and to work for his good pleasure.

Revelation 16:5-6

And I heard the angel of the waters say, "Righteous are you, who are and who were, O Holy One, because you judged these things;

Revelation 18:20

Rejoice over her, O heaven, and you saints and apostles and prophets, because God has pronounced judgment for you against her!"

Revelation 19:2

for his judgments are true and just; he has judged the great harlot who corrupted the earth with her fornication, and he has avenged on her the blood of his servants."

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 say, "Righteous are you, who are and who were, O Holy One, because you judged these things;
Revelation 18:20
Rejoice over her, O heaven, and you saints and apostles and prophets, because God has pronounced judgment for you against her!"
Revelation 19:2
for his judgments are true and just; he has judged the great harlot who corrupted the earth with her fornication, and he has avenged on her the blood of his servants."

When

1 Corinthians 9:17
For if I do this voluntarily, I have a reward; but if it is not of my will, I have a stewardship entrusted to me.
2 Corinthians 8:12
For if the readiness is there, it is acceptable according to what a man has, not according to what he does not have.
2 Corinthians 9:7
Each one must give just as he has purposed in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.
Philippians 2:13
for it is God who is at work in you, both to will and to work for his good pleasure.
Philemon 1:14
but without your consent I did not want to do anything, so that your goodness would not be, in effect, by compulsion but of your own free will.