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 Kings 8:61

Let your heart be completely with Yahweh our God by walking in his statutes, by keeping his commands as this day."

Deuteronomy 16:10-11

And [then] you shall celebrate the Feast of Weeks for Yahweh your God with the measure of the freewill offering of your hand that you shall give [just] as Yahweh your God has blessed you.

Judges 5:9

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

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.

Proverbs 23:15-16

My child, if your heart is wise, my heart will be glad--even me!

Luke 15:6

And [when he] returns to [his] home, he calls together [his] friends and neighbors, saying to them, 'Rejoice with me, because I have found my sheep that was lost!'

John 15:11

I have spoken these [things] to you in order that my joy may be in you, and your joy may be made complete.

2 Corinthians 8:3

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}.

2 Corinthians 9:7-8

Each one [should give] as he has decided in his heart, not {reluctantly} or from compulsion, for God loves a cheerful giver.

Philippians 4:10

But I rejoiced in the Lord greatly that now at last {you have renewed your concern for me}, for whom also you were thinking, but you had no opportunity [to express it].

1 Thessalonians 3:6-9

But now, [because] Timothy has come to us from you and has brought good news to us of your faith and love, and that {you always think kindly of us}, desiring to see us just as also we [desire to see] you,

Philippians 2:15-17

in order that you may become blameless and innocent, children of God without fault in the midst of a crooked and perverted generation, among whom you shine as stars in the world,

Philippians 4:1

So then, my beloved and greatly desired brothers, my joy and crown, thus stand firm in the Lord, dear friends.

Treasury of Scripture Knowledge

Summary

Then the people rejoiced, for that they offered willingly, because with perfect heart they offered willingly to the LORD: and David the king also rejoiced with great joy.

General references

Bible References

They offered

Deuteronomy 16:10
And [then] you shall celebrate the Feast of Weeks for Yahweh your God with the measure of the freewill offering of your hand that you shall give [just] as Yahweh your God has blessed you.
Judges 5:9
My heart [goes out] to the commanders of Israel, those offering themselves willingly among the people; bless Yahweh!
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,
2 Corinthians 9:7
Each one [should give] as he has decided in his heart, not {reluctantly} or from compulsion, for God loves a cheerful giver.

Perfect heart

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.
1 Kings 8:61
Let your heart be completely with Yahweh our God by walking in his statutes, by keeping his commands as this day."

David

Proverbs 23:15
My child, if your heart is wise, my heart will be glad--even me!
Luke 15:6
And [when he] returns to [his] home, he calls together [his] friends and neighbors, saying to them, 'Rejoice with me, because I have found my sheep that was lost!'
John 15:11
I have spoken these [things] to you in order that my joy may be in you, and your joy may be made complete.
Philippians 2:15
in order that you may become blameless and innocent, children of God without fault in the midst of a crooked and perverted generation, among whom you shine as stars in the world,
Philippians 4:1
So then, my beloved and greatly desired brothers, my joy and crown, thus stand firm in the Lord, dear friends.
1 Thessalonians 3:6
But now, [because] Timothy has come to us from you and has brought good news to us of your faith and love, and that {you always think kindly of us}, desiring to see us just as also we [desire to see] you,

General references

Exodus 35:21
And they came--every man whose heart lifted him and every man whose spirit impelled him--they brought Yahweh's contribution for the work of the tent of assembly and for all its service and for the holy garments.