Luke 15:6

and coming to the house, he calls together his friends and neighbors, saying, Congratulate me; for I have found my sheep that was lost.

John 15:11

I have spoken these things to you that my joy may be in you, and your joy be completed.

2 Corinthians 8:3

For according to their ability, I testify, and beyond their ability, of their own accord,

2 Corinthians 8:12

For if there is a willing mind, a man is acceptable according to what he has, and not according to what he has not.

2 Corinthians 9:7-8

Let each one contribute as he chooses in his heart, not with regret or from necessity; for God loves a cheerful giver.

Philippians 4:10

But I rejoice greatly in the Lord, that now at length you began again to care for me, for whom also you did care, but had no opportunity [to serve me].

1 Thessalonians 3:6-9

But now Timothy having come to us from you and told us the good news of your faith and love, and that you have a good remembrance of us always, desiring to see us, as we also you,

Philippians 2:15-17

that you may be blameless and sincere, children of God without blame in the midst of a crooked and perverse generation, in which you shine as luminaries in the world,

Philippians 4:1

So, my beloved and much desired brothers, my joy and crown, so stand firm in the Lord, beloved.

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.

Bible References

They offered

2 Corinthians 8:3
For according to their ability, I testify, and beyond their ability, of their own accord,
2 Corinthians 9:7
Let each one contribute as he chooses in his heart, not with regret or from necessity; for God loves a cheerful giver.

David

Luke 15:6
and coming to the house, he calls together his friends and neighbors, saying, Congratulate me; for I have found my sheep that was lost.
John 15:11
I have spoken these things to you that my joy may be in you, and your joy be completed.
Philippians 2:15
that you may be blameless and sincere, children of God without blame in the midst of a crooked and perverse generation, in which you shine as luminaries in the world,
Philippians 4:1
So, my beloved and much desired brothers, my joy and crown, so stand firm in the Lord, beloved.
1 Thessalonians 3:6
But now Timothy having come to us from you and told us the good news of your faith and love, and that you have a good remembrance of us always, desiring to see us, as we also you,