they offered

Deuteronomy 16:10, 11
And you shall celebrate the Feast of Weeks to the LORD your God with a freewill offering that you give in proportion to how the LORD your God has blessed you, . . .

Judges 5:9
My heart is with the princes of Israel, with the volunteers among the people. Bless the LORD!

Psalm 110:3
Your people shall be willing on Your day of battle. Arrayed in holy splendor, from the womb of the dawn, to You belongs the dew of Your youth.

2 Corinthians 8:3, 12
For I testify that they gave according to their ability and even beyond it. Of their own accord, . . .

2 Corinthians 9:7, 8
Each one should give what he has decided in his heart to give, not out of regret or compulsion. For God loves a cheerful giver. . . .

perfect heart

1 Chronicles 29:17
I know, my God, that You test the heart and delight in uprightness. All these things I have given willingly and with an upright heart, and now I have seen Your people who are present here giving joyfully and willingly to You.

1 Kings 8:61
So let your heart be fully devoted to the LORD our God, as it is this day, to walk in His statutes and to keep His commandments."

David

Proverbs 23:15, 16
My son, if your heart is wise, my own heart will indeed rejoice. . . .

Luke 15:6
comes home, and calls together his friends and neighbors to tell them, 'Rejoice with me, for I have found my lost sheep!'

John 15:11
I have told you these things so that My joy may be in you and your joy may be complete.

Philippians 2:15-17
so that you may be blameless and pure, children of God without fault in a crooked and perverse generation, in which you shine as lights in the world . . .

Philippians 4:1, 10
Therefore, my brothers, whom I love and long for, my joy and crown, that is how you must stand firm in the Lord, my beloved. . . .

1 Thessalonians 3:6-9
But now Timothy has returned from his visit with the good news about your faith, your love, and the fond memories you have preserved, longing to see us just as we long to see you. . . .