2 Chronicles 17:16

and at his side, Amasiah the son of Zicri, who had made a freewill offering to Yahweh, and with him [were] two hundred thousand mighty armed warriors.

Judges 5:9

My heart [goes out] to the commanders of Israel, those offering themselves willingly among the people; bless Yahweh!

Judges 5:2

"When long hair hangs loosely in Israel, when the people willingly offer themselves, bless Yahweh!

1 Chronicles 29:9

And the people rejoiced over their freewill offering, for with a whole heart they had willingly offered to Yahweh, and King David also rejoiced with great joy.

1 Chronicles 29:14

And indeed, who [am] I, and who [are] my people that we retain power to offer according to these [offerings] willingly? For everything [is] from you, and from your hand we have given to you.

1 Chronicles 29:17

And I know, my God, that you yourself test the heart and are pleased with uprightness. I, in the uprightness of my heart, have willingly offered all these [things], and now I have seen your people who are found here willingly offer to you.

Psalm 110:3

Your people {will volunteer} in the day of your power. In holy splendor, from [the] womb of [the] dawn, you will have the dew of your youth.

2 Corinthians 8:3-5

I testify that [they gave] according to [their] ability, and beyond [their] ability, by their own choice,

2 Corinthians 8:12

For if the eagerness is present {according to what one has}, [it is] acceptable not {according to what one does not have}.

Treasury of Scripture Knowledge

Summary

And next him was Amasiah the son of Zichri, who willingly offered himself unto the LORD; and with him two hundred thousand mighty men of valour.

General references

Bible References

Willingly

Judges 5:2
"When long hair hangs loosely in Israel, when the people willingly offer themselves, bless Yahweh!
1 Chronicles 29:9
And the people rejoiced over their freewill offering, for with a whole heart they had willingly offered to Yahweh, and King David also rejoiced with great joy.
Psalm 110:3
Your people {will volunteer} in the day of your power. In holy splendor, from [the] womb of [the] dawn, you will have the dew of your youth.
2 Corinthians 8:3
I testify that [they gave] according to [their] ability, and beyond [their] ability, by their own choice,

General references

Genesis 13:16
I will make your descendants like the dust of the earth which, if anyone were able to count the dust of the earth, your descendants would be [so] counted.
Numbers 1:26
From the descendants of Judah, their genealogies according to their clans, according to {their families}, according to [the] number of names, from {those twenty years old} and above, everyone who [is able] to go to war: