1 Corinthians 9:17

Now if I do this willingly, I have a reward; and if unwillingly, yet I am intrusted with the commission, and I must execute it.

2 Corinthians 8:12

For if there be first a willing mind, any me is accepted according to what he hath, not according to what he hath not.

2 Corinthians 9:7

Let every one give as he chuses in his own heart; not with reluctance, or constraint: for God loveth a chearful giver.

Philippians 2:13

for it is God that worketh in you both to will, and to work, out of his own good-pleasure.

Revelation 16:5-6

And I heard the angel of the waters saying, Righteous art Thou, O Lord, who art, and who ever wast; and who art holy, for Thou hast ordered these things: because they have shed the blood of saints and prophets,

Revelation 18:20

Rejoice over her, O heaven, and ye holy apostles and prophets, for God hath avenged you on her.

Revelation 19:2

He hath judged the great whore, who corrupted the earth with her fornication, and hath 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, O Lord, who art, and who ever wast; and who art holy, for Thou hast ordered these things: because they have shed the blood of saints and prophets,
Revelation 18:20
Rejoice over her, O heaven, and ye holy apostles and prophets, for God hath avenged you on her.
Revelation 19:2
He hath judged the great whore, who corrupted the earth with her fornication, and hath avenged the blood of his servants at her hand:

When

1 Corinthians 9:17
Now if I do this willingly, I have a reward; and if unwillingly, yet I am intrusted with the commission, and I must execute it.
2 Corinthians 8:12
For if there be first a willing mind, any me is accepted according to what he hath, not according to what he hath not.
2 Corinthians 9:7
Let every one give as he chuses in his own heart; not with reluctance, or constraint: for God loveth a chearful giver.
Philippians 2:13
for it is God that worketh in you both to will, and to work, out of his own good-pleasure.
Philemon 1:14
But I would do nothing without thy knowledge, that thy kindness might not be as it were forced, but voluntary.